Text consolidated by Valsts valodas centrs (State Language Centre) with amending regulations of: 1 February 2011 [shall come into force from 4 February 2011]; 7 April 2015 [shall come into force from 1 June 2015]; 10 July 2018 [shall come into force from 13 July 2018]; 7 January 2020 [shall come into force from 17 January 2020]; 18 February 2021 [shall come into force from 24 February 2021]. If a whole or part of a paragraph has been amended, the date of the amending regulation appears in square brackets at the end of the paragraph. If a whole paragraph or sub-paragraph has been deleted, the date of the deletion appears in square brackets beside the deleted paragraph or sub-paragraph.

Republic of Latvia Cabinet Regulation No. 325 Adopted 15 May 2007

Labour Protection Requirements when Coming in Contact with Chemical Substances at Workplaces

Issued pursuant to
Section 25, Clause 11 of the Labour Protection Law and
Section 16 of the Chemical Substances Law

[1 February 2011]

I. General Provisions

1. This Regulation prescribes labour protection requirements for employees when coming in contact with chemical substances (including mixtures) at workplaces if a risk is caused or may be caused from the effect of chemical substances present in the work environment or related to the working process, as well as special restrictions and prohibitions in relation to individual dangerous chemical substances or mixtures.

[1 February 2011]

2. This Regulation applies to workplaces where an employee is or may be exposed to the effect of such chemical substances and mixtures:

2.1. which conforms to the criteria laid down in Annex 1 to Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006 (hereinafter - Regulation No 1272/2008) for classification of substances in any of physical or health hazard classes irrespective of whether this chemical substance is classified in accordance with Regulation No 1272/2008;

2.2. which are present in the working environment or utilised at work and due to the physical, chemical and toxic properties thereof endanger the safety and health of an employee;

2.3. to which an occupational exposure limit value (OEV) has been determined - such concentration of chemical substances or mixtures in the air of the work environment which for the whole duration of the life of an employee does not cause the contraction of a disease or deterioration of health which can be determined by modern investigative methods if the relevant chemical substances and mixtures affect an employee not longer than 8 hours during a working day or not longer than 40 hours a week (Annex 1, 2); and

2.4. to which a biological limit value (BLV) has been determined - indicators of concentration of chemical substances and metabolites thereof received by the organism of the employee and the biological effects caused by chemical substances in the biological environment of the employee, which values shall be determined for healthy employees who are exposed to chemical substances and mixtures on the level of the occupational exposure limit value (OEV) (Annex 3).

[1 February 2011; 7 April 2015]

3. The occupational exposure limit value (OEV) for a chemical substance shall be determined taking into account physico-chemical properties, toxicity, epidemiological researches in the field of non-infectious diseases and conditions for technological process, as well as evaluating the data regarding chemical substances with a similar structure. The occupational exposure limit value (OEV) of a chemical substance shall be used for evaluation of chemical risk on the working environment (concentration of the chemical substance in the air of the working environment shall be compared with the occupational exposure limit value (OEV)).

4. The occupational exposure limit value (OEV) shall be defined as an average arithmetical value for a working day of 8 hours (average shift concentration) or as a value for a short period of time (up to 15 min., for fibrogenic substances - up to 30 min.). The occupational exposure limit value (OEV) shall be measured at a temperature of 20 ^oC at a pressure of 101.3 kPa and expressed in milligrams per cubic meter (mg/m³), but the concentration of gases and vapour may be expressed also in measurement units not dependent on the temperature and pressure - ppm (ml/m³), which is a millionth of the capacity.

5. The Ministry of Welfare shall, in co-operation with the relevant standards technical committee, recommend to the State limited liability company "Standardisation, Accreditation and Metrology Centre" a list of standards to be drawn up, adapted and applied in relation to this Regulation.

[17 April 2015]

6. The State limited liability company "Standardisation, Accreditation and Metrology Centre" shall publish on its official web page a list of those Latvian national standards applied to ensure the conformity with the requirements laid down in this Regulation (hereinafter - the applicable standards).

[7 April 2015]

7. The employer shall be liable for compliance with this Regulation.

8. Compliance with this Regulation shall be controlled by the State Labour Inspectorate and other authorities in accordance with the competence specified thereto by the Chemical Substances Law.

[1 February 2011]

II. Determination and Assessment of Risk

9. The employer shall ensure the assessment of the risk caused by chemical substances and mixtures in conformity with the procedures for the internal supervision of the work environment and the procedures for the risk assessment in the work environment of an undertaking involving trusted representatives and employees.

[1 February 2011]

10. To determine the concentration of chemical substances in the air of the work environment, the employer shall, upon request of the control authorities referred to in Paragraph 8 of this Regulation, involve the laboratory accredited in the national accreditation body in accordance with the laws and regulations regarding the assessment, accreditation, and surveillance of conformity assessment bodies, or in an accreditation body of another European Union Member State or European Economic Area State which performs the conformity assessment of laboratories in specification of the concentration of chemical substances in the air of the work environment.

[7 April 2015]

11. The employer shall determine workplaces and work processes where chemical substances and mixtures cause or may cause a risk to the safety and health of employees, and assess the risk thereof, taking into account:

11.1. information in the safety data sheets of the chemical substances and mixtures received from a supplier or importer;

11.2. results of the health examination of employees;

11.3. results and prognoses of preventative measures taken or to be taken;

11.4. other information regarding the dangerousness of the chemical substances and mixtures;

11.5. the occupational exposure limit value (OEV) of chemical substances in the air of the work environment;

11.6. the biological limit values (BLV) of chemical substances and mixtures;

11.7. particular work conditions and processes at a workplace and in a room (including at adjacent workplaces), as well as dangerous properties of chemical substances and mixtures present in the work environment due to which the risk is caused or increased to the health and safety of employees in the relevant work conditions and in emergency situations;

11.8. the occupational exposure concentration of chemical substances in the air of the work environment, which is specified as 8 hours or temporary occupational exposure concentration (one or both of these values), as well as the type and duration of the effect of substances;

11.9. the amount of chemical substances and mixtures at the workplace;

11.10. risk of potential accidents which is related to the use of chemical substances and mixtures at work and the physico-chemical properties thereof:

11.10.1. if there are binding regulatory enactments regarding the procedures for the industrial accident risk assessment and risk reduction measures for the undertaking, then, in carrying out the procedures specified therein, also the requirements specified in this Regulation shall be taken into account; or

11.10.2. if there are no binding regulatory enactments regarding the procedures for the industrial accident risk assessment and risk reduction measures for the undertaking, the accident risk reduction measures shall be determined by this Regulation; and

11.11. the results of other risk assessments (for example, the risk assessment of a new chemical substance or risk assessment of an accident).

[1 February 2011]

12. Risk shall be assessed regularly once a year, as well as in cases when:

12.1. significant changes have occurred in the work environment (for example, changes in the composition, physical state or raw materials of a preparation);

12.2. new activities have been introduced or the production process has been modified (for example, work equipment, technological and control process);

12.3. the results of inspections in the work environment indicate the possible risk of the effect of chemical substances on employees, it is specified in measurements, that the occupational exposure limit value (OEV) has been exceeded or deficiencies of the technological process, equipment or technical methods have been determined;

12.4. an emergency situation has occurred which has caused or precipitated an accident, fire, explosion or release of dangerous chemical substances and mixtures;

12.5. an acute case of occupational poisoning or an occupational disease caused by a chemical risk factor has been confirmed; or

12.6. new information regarding the harmfulness of the relevant chemical substance and mixture to the health of employees, information regarding the possibility of fire or explosion, as well as regarding the possibility of the release of dangerous chemical substances or dangerous mixtures.

[1 February 2011]

13. In the cases referred to in Paragraph 12 of this Regulation, the employer shall assess the risk caused by changes and take the necessary preventative measures before assigning employees to work.

14. The maintenance of equipment and other activities, during which the safety and health of employees may be endangered and employees may be exposed to the effects of the chemical substances and mixtures referred to in Paragraph 2 of this Regulation, shall also be taken into account in the risk assessment.

[1 February 2011]

15. The employer shall ensure that the concentration of chemical substances in the air of the work environment is regularly determined and compared with the occupational exposure limit value (OEV), and in accordance with economic and technical capabilities the employer shall take measures for the reduction of the actual values of occupational exposure. The employer shall determine the exposure of chemical substances in the air of the work environment and assess it in accordance with the methodology specified in Annex 4 to this Regulation.

16. If the applicable standards have been observed in the exposure assessment of inhalable chemical substances and mixtures, it is considered that the requirements for the exposure assessment of inhalable chemical substances and mixtures at the workplace are observed.

[1 February 2011]

17. Periodicity for concentration measurements of a chemical substance shall be determined in accordance with the exposure index of the chemical substance, which is obtained by dividing the concentration of the chemical substance (occupational exposure concentration) in the working environment by the occupational exposure limit value (OEV):

EI =	C	, where
	AER

EI - the exposure index of the chemical substance;

C - the concentration of the chemical substance (occupational exposure concentration) in the air of the working environment.

18. If, in determining the concentration of a chemical substance during one working day or one shift, the exposure index of the chemical substance is more than 1 (EI > 1), the exposure in the air of the working environment is larger than the occupational exposure limit value (OEV). This causes a risk to the safety and health of an employee and the employer shall immediately perform measures for risk elimination. After implementation of the referred to measures the employer shall perform repeated measurements of the concentration of the chemical substance in order to ascertain the efficiency of the measures performed and the reduction of risk up to an admissible level.

[1 February 2011]

19. If in determining the concentration of a chemical substance during one working day or one shift the exposure index of the chemical substance is equal to 0.1 or less (EI ≤ 0,1), the exposure of the chemical substance in the air of the working environment is equal to 1/10 of the occupation exposure limit value (OEV) or less. If it is possible to prove that these levels are characteristic for the working environment in long term, periodical measurements shall be optional.

20. The time interval for the next periodical measurement shall be determined in accordance with the result obtained in the previous measurements. The maximum time interval up to the next periodical measurement shall be:

20.1. 104 weeks, if EI ≤ 0.5 in the previous measurements (occupational exposure concentration is less than a half of the occupational exposure limit value (OEV));

20.2. 52 weeks, if 0.5 < EI ≤ 0.75 in the previous measurements (occupational exposure concentration is between a half and 3/4 of the occupational exposure limit value (OEV)); or

20.3. 24 weeks, if 0.75 < EI ≤ 1 in the previous measurements (occupational exposure concentration is more than 3/4 or 75 % of the occupational exposure limit value (OEV)).

[1 February 2011]

21. Measurements shall be performed during a working process (typical working conditions). If working conditions change and a risk increase has been determined or is possible, additional measurements of chemical substances shall be carried out.

22. If fast acting chemical substances are discharged in the air of the working environment, an alarm system shall be installed for the control of such substances, which notifies regarding the exceeding of the occupational exposure limit value (OEV).

23. If employees are exposed to more than one chemical substance or mixture (simultaneously or gradually), the risk shall be assessed taking into account the potential mutual and total exposure of all the chemical substances and mixtures used at work and the effect thereof on the safety and health of employees:

23.1. if in the air of the working environment there are several chemical substances with opposite (antagonistic) effects concurrently, the occupational exposure limit values (OEVs) shall remain the same as in case when each substance would affect separately; or

23.2. if in the air of the working environment there are several dangerous chemical substances with a similar (synergic) activity, the total effects of these substances shall be calculated using the following formula:

C1	+	C2	+ ········ +	Cn	≤ 1, where
AER1		AER2		AERn

C₁; C₂; C_n - the concentration of the substances in the air of the working environment (mg/m³);

AER₁; AER₂; AER_n - the occupational exposure limit values of the substances (mg/m³).

The actual concentration ratio of the substances exposure against OEV (exposure index EI) may not exceed 1 in summing. If the sum of these fractions is 1, it complies with the limit value of the total effect.

[1 February 2011]

24. The employer shall document the results of the risk assessment, including measurement results necessary for the risk assessment and measures taken for the elimination or reduction of risk caused by chemical substances and mixtures. Such documentation shall be kept for at least three years.

[1 February 2011]

25. The employer shall ensure the possibility for employees, trusted representatives thereof and representatives of employees to become acquainted with the risk assessment and measurement results, as well as with the effect of chemical substances and mixtures on the safety and health of employees.

[1 February 2011]

26. The employer shall ensure accessibility of the risk assessment results, including measurement results, to a doctor or an institution responsible for the health care of employees.

27. [1 February 2011]

28. [1 February 2011]

29. [1 February 2011]

III. Prevention and Reduction of Risk

30. If the type of work and technical capabilities permit this, the employer shall replace the dangerous chemical substances and dangerous mixtures with chemical substances and mixtures that are not dangerous or are less dangerous in the particular working conditions to the safety and health of employees.

[1 February 2011]

31. If a risk to the safety and health of employees has been determined, the employer shall eliminate such risk or, if it is not possible considering the specific nature of the work, reduce the risk, taking the following measures:

31.1. equip the workplace with appropriate equipment, as well as ensure such work organisation, technical methods and technological processes that do not cause a risk to the safety and health of employees;

31.2. ensure the regular maintenance of technological equipment, workplaces and facilities;

31.3. by assigning an employee to work with chemical substances and mixtures, take into account the professional education, experience, training and level of preparedness of the employee in the field of labour protection;

31.4. restrict the number of such employees who work with chemical substances and mixtures;

31.5. eliminate the contact of employees with chemical substances and mixtures or reduce to the minimum the duration and intensity of exposure thereof;

31.6. ensure that only such amount of chemical substances and mixtures that are necessary for the performance of particular work is present in work premises; and

31.7. when planning and organising the work process:

31.7.1. ensure correct storage of chemical substances and mixtures taking into account the compatibility, explosive and fire safety properties thereof;

31.7.2. separate the place of storage of chemical substances and mixtures from work premises and equip it with exhaust ventilation;

31.7.3. eliminate the release of chemical substances, but if the release has occurred, provide immediate measures for the liquidation or reduction of the consequences of the release;

31.7.4. classify and mark chemical substances and mixtures, as well as waste containing such substances or mixtures, ensure safe and fast collection thereof in accordance with the regulatory enactments regarding the classification, marking, packaging, storage, transportation and utilisation of chemical substances and mixtures, as well as dangerous waste;

31.7.5. demarcate the workplaces appropriately and use safety signs and notices specified in the regulatory enactments regarding labour protection requirements for the use of safety signs;

31.7.6. develop action measures for potential emergency situations; and

31.7.7. arrange premises appropriate for the rest and practical needs of employees in which the risk caused by chemical substances and mixtures has been eliminated.

[1 February 2011]

32. Risk elimination and reduction measures shall be performed in the following order:

32.1. elimination or maximum reduction of the risk caused by chemical substances and mixtures at a workplace by establishing an appropriate system of work processes and technical supervision;

32.2. utilisation of appropriate work equipment, technologies and materials, and control of the work environment for the elimination or reduction of the spreading of dangerous chemical substances;

32.3. selection and introduction of collective protection measures directly at the source of the risk (for example, the general and, if necessary, local exhaust ventilation has been arranged according to the project and calculations); and

32.4. utilisation of individual labour protection measures, including personal protection equipment if the effect of chemical substance and mixture exposure may not be eliminated by the measures referred to in this Paragraph.

[1 February 2011]

33. If it has been determined that the occupational exposure limit values (OEV) of chemical substances have been exceeded, the employer shall immediately take appropriate labour protection measures.

34. In storing, replacing and separating incompatible chemical substances and mixtures, the employer shall take into account the risk caused by the physical, chemical and toxic properties of the specific chemical substances and mixtures and perform the following technical and organisational measures for the provision of safety and health of employees:

34.1. eliminate the accumulation of a dangerous concentration of highly flammable substances or chemically unstable substances (substances which under the influence of various external factors do not retain their properties for a long time) at the workplace and in the air of the work environment;

34.2. ensure compliance with the fire safety and explosion-proof regulations and exclude the presence of ignition sources at workplaces where activities with explosive chemical substances, mixtures and highly flammable and chemically unstable substances or mixtures thereof are performed;

34.3. ensure provision of the first aid and other measures that reduce the effect of harmful factors on the health and safety of employees if fire or explosion has occurred due to the ignition of flammable substances or reduce other consequences caused by chemically unstable substances or mixtures thereof; and

34.4. ensure compliance with the regulatory enactments in respect of the safety of equipment and protective systems to be used in an explosive atmosphere.

[1 February 2011]

35. The employer shall ensure the labelling of packaging, containers and pipelines of chemical substances and placement of safety signs at workplaces, and conformity of the labelling with the contents of the packaging, container or pipeline in accordance with the regulatory enactments regarding the procedures for the classification, labelling and packaging and labour protection requirements for the use of safety signs.

[1 February 2011]

IV. Measures in Emergency Situations

36. If regulatory enactments regarding the procedures for the assessment of risk of industrial accidents and measures for risk reduction are binding on the undertaking, the employer shall ensure a prior notification in accordance with this Regulation.

37. If regulatory enactments regarding the procedures for the assessment of risk of industrial accidents and measures for risk reduction are not binding on the undertaking, but in carrying out the assessment of risk it is determined that there is a risk of accident involving dangerous chemical substances or mixtures, and it is foreseeable that the consequences of an accident would affect the territory outside the undertaking, the employer shall submit the information in writing to the relevant territorial unit of the State Fire-fighting and Rescue Service, indicating the chemical substance or the name of the mixture, class of dangerousness, as well as the relevant risk and safety phrases.

[1 February 2011]

38. The employer in accordance with the risk assessment shall develop measures to be taken by employees in case of potential incidents or accidents at workplaces where work with chemical substances and mixtures is performed and which are subject to the risk of an accident, determining the responsible employees and indicating the procedures on how to contact these employees in an emergency situation, as well as indicating the telephone numbers of responsible employees and the State Fire-fighting and Rescue Service, as well as determining the information to be notified in case of an accident.

[1 February 2011]

39. Theoretical and practical training of employees regarding the provision of first aid and action in emergency situations (for example, fire, release of chemical substances) shall be organised at least once a year taking into account the specific nature of the workplace and properties of chemical substances and mixtures to be used at work.

[1 February 2011]

40. If an emergency situation occurs, the employer shall immediately inform employees thereof and take measures for the elimination or reduction of the harmful effects of the chemical substances and mixtures and the stabilisation of the situation (for example, disconnection of equipment, evacuation of employees, containment of fire, leakage control, determination and demarcation of the danger zone).

[1 February 2011]

41. Only such employees as are involved in repairs or who take specific measures for the elimination of the emergency situation, and who are specially trained for such actions, may be present in the danger zone in emergency situations. Only such repairs or other work necessary for the elimination or reduction of consequences and threat caused by the emergency may be performed in the danger zone in emergency situations.

42. The employer shall provide employees working in the danger zone with personal protective equipment, specialised safety equipment and work equipment appropriate for the particular working conditions. Personal protective equipment, specialised safety equipment and work equipment shall be used until the dangerous factors are completely eliminated in accordance with the risk assessment of such factors and the instructions of the manufacturer. Persons without appropriate personal protective equipment are prohibited from being present in the danger zone in emergency situations.

43. The employer shall ensure efficient operation of alarm and emergency communication means in order to provide information immediately to each employee regarding the threats to his or her safety and health.

44. The employer shall regularly, but at least once a year in conformity with the risk assessment, revise and update the measures to be performed in emergency situations, as well as for the elimination of an emergency situation.

V. Consultation, Information and Training

45. The employer shall provide employees and trusted representatives thereof with the training appropriate to the specific nature of work and necessary information regarding the relevant labour protection measures so that each employee knows how to protect himself or herself and other employees at the workplace. The employer shall ensure the following information:

45.1. regarding the risk assessment performed in accordance with the requirements of Chapter II of this Regulation taking into account any changes at a workplace that may change the risk assessment data;

45.2. regarding measures for risk elimination and reduction, and changes in the risk assessment data;

45.3. regarding chemical substances and mixtures in the workplace, concentration thereof in the air of the work environment, risk to safety and health of employees, as well as regarding the occupational exposure limit values (OEV) of chemical substances and mixtures;

45.4. regarding the characterisation of chemical substances and mixtures provided for in the safety data sheets in accordance with Article 31 of Regulation (EC) No 1907/2006 of the European Parliament and of the Council of 18 December 2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), establishing a European Chemicals Agency, amending Directive 1999/45/EC and repealing Council Regulation (EEC) No 793/93 and Commission Regulation (EC) No 1488/94 as well as Council Directive 76/769/EEC and Commission Directives 91/155/EEC, 93/67/EEC, 93/105/EC and 2000/21/EC;

45.5. regarding action and measures in emergency situations.

[1 February 2011; 7 April 2015]

46. The employer shall provide training of such employees who come or may come into contact with chemical substances or mixtures:

46.1. prior to the commencement of work;

46.2. regularly, at least once a year; and

46.3. repeatedly if changes which may affect the safety and health of employees have occurred in the work environment, new information regarding the properties of the chemical substances has been received or it has been determined that the level of knowledge of the employee is not adequate.

[1 February 2011]

47. Employees, trusted representatives of employees and representatives thereof shall consult and participate in resolving of the issues provided for in this Regulation in accordance with the Labour Protection Law.

VI. Special Restrictions and Prohibitions for the Production, Manufacture and Use of Chemical Substances and Mixtures at Workplaces, as well as in Performing Other Activities Therewith

[1 February 2011]

48. Special restrictions that relate to the activities with individual dangerous chemical substances shall be regulated by the regulatory enactments regarding restrictions on the production, trade and use of dangerous chemical substances and mixtures, except the following cases:

48.1. performance of scientific research, tests and analysis;

48.2. processing or destruction of chemical substances and mixtures - by-products or production waste; and

48.3. production and utilisation of chemical substances and mixtures as intermediate products in a unified, continual process.

[1 February 2011]

49. In the exception cases specified in Paragraph 48 of this Regulation it is permitted to perform activities with individual dangerous chemical substances if the requirements referred to in Paragraph 50 of this Regulation have been complied with and the employer has prepared and submitted to the control authorities the following data prior to the commencement of work:

49.1. justification of the exception;

49.2. calculations on the quantity of chemical substances or mixtures to be used per year;

49.3. descriptions of such activities (reactions, processes) during which the relevant chemical substance or mixture is used;

49.4. the estimated number of employees; and

49.5. the technical and other measures that eliminate or reduce the risk to the safety and health of employees.

[1 February 2011]

50. The chemical substances and mixtures referred to in Paragraph 48 of this Regulation may be produced and utilised only when production and utilisation is performed in a closed system (a system which does not allow direct contact of an employee with a chemical substance or mixture) from which chemical substances are output only if it is necessary for the control of the process or system maintenance.

[1 February 2011]

VII. Health Surveillance of Employees

51. Mandatory health examinations shall be performed for employees who may come into contact with chemical substances and mixtures at a workplace in accordance with the procedures specified by regulatory enactments regarding mandatory health examination. Upon sending an employee to a mandatory health examination, the employer shall indicate information in the mandatory health examination card regarding chemical substances, the type and duration of exposure thereto and the concentration thereof in the air of the working environment.

[1 February 2011]

52. If an employee comes or may come into contact with chemical substances or mixtures at the workplace, a competent specialist or a competent authority and the State Labour Inspectorate, if necessary, shall have access to the results of his or her health examination in accordance with the Labour Protection Law.

[1 February 2011]

53. An employee who comes or may come into contact with chemical substances or mixtures at the workplace has the right to become acquainted with the results of the health examination related thereto.

[1 February 2011]

54. If employees come or may come into contact with chemical substances and mixtures at the workplace, the results of the health examination shall be taken into account when developing labour protection measures at a particular workplace.

[1 February 2011]

55. If it has been determined in a health examination that a disease or health disorders of employees have been caused due to the contact with chemical substances or mixtures at the workplace or the biological limit values (BLV) have been exceeded:

55.1. a doctor of occupational diseases shall inform the employee regarding the results of the mandatory examination and provide information and instructions regarding health care also after termination of the effect of the chemical substances, as well as in accordance with the regulatory enactments regarding the procedures for the performance of mandatory health examinations shall notify the employer regarding non-conforming conditions of the work environment which may negatively affect other persons employed in similar conditions, indicating, that they also are recommended to undergo mandatory health examinations;

55.2. the employer shall carry out a repeat evaluation of the risk assessment results and labour protection measures that eliminate or reduce the relevant risk in conformity with Chapter III of this Regulation;

55.3. the employer shall consider the recommendations of a doctor of occupational diseases or occupational health care, a labour protection specialist, a competent specialist or a competent authority when taking measures of labour protection for the elimination or reduction of the risk caused by chemical substances and mixtures, providing a possibility to assign employees to alternative work where the risk of exposure to chemical substances and mixtures does not exist; and

55.4. the employer shall ensure systematic health surveillance and provide a repeat health examination to any employee who has been subject to similar exposure of chemical substances or mixtures.

[1 February 2011]

55.¹ The employer shall keep the data of health examinations referred to in this Chapter for 40 years after the last known contact of the employee with chemical substances, afterwards the data shall be handed over to the archives. If the employer is liquidated, the data of health examinations shall be kept in accordance with the requirements specified in the regulatory enactments regarding keeping of archive documents.

[1 February 2011]

VIII. Closing Provisions

[7 January 2020]

56. Cabinet Regulation No. 399 of 3 September 2002, Labour Protection Requirements when in Contact with Chemical Substances at Workplaces (Latvijas Vēstnesis, 2005, No. 72) is repealed.

57. The substances referred to in Paragraphs 329.¹ and 523 of Annex 1 to this Regulation shall have the following occupational exposure limit values and transitional periods:

57.1. for hardwood dust - 3 mg/m³ from 17 January 2020 until 17 January 2023;

57.2. for chromium (VI) compounds - 0.010 mg/m³ from 17 January 2020 until 17 January 2025, but for chromium (VI) compounds in welding or plasma cutting processes or similar work processes producing vapours - 0.025 mg/m³.

[7 January 2020]

58. Paragraphs 336.¹, 528.¹, and 603.¹ of Annex 1 and Paragraphs 59.¹, 236.¹, and 311.¹ of Annex 2 to this Regulation shall come into force on 20 May 2021. Amendments to Paragraphs 72, 231, 275, 336, 388, 429, and 598 of Annex 1 to this Regulation by which the occupational exposure limit value is specified and amendments to Annex 2 regarding the deletion of Paragraphs 306 and 512 shall come into force on 20 May 2021.

[18 February 2021]

59. Paragraphs 77.¹, 110.¹, and 427.² of Annex 1 to this Regulation, Paragraph 8 of the note section of Annex 1, and amendments to Annex 3 shall come into force on 11 July 2021. The amendment to Paragraphs 271 and 344 of Annex 1 to this Regulation by which the occupational exposure limit value is specified shall come into force on 11 July 2021. The requirement in relation to the occupational exposure limit value referred to in Paragraph 77.¹ of Annex 1 to this Regulation for the arsenic acid and its salts as well as for inorganic arsenic compounds in the field of copper smelting shall come into force on 11 July 2023.

[18 February 2021]

60. The substances referred to in Paragraphs 110.¹, 271, and 344 of Annex 1 to this Regulation shall have the following occupational exposure limit values and transitional periods:

60.1. for formaldehyde in the fields of health care, burial, and embalming - 0.62 mg/m³ or 0.5 ppm until 11 July 2024;

60.2. for beryllium and inorganic beryllium compounds - 0.0006 mg/m³ until 11 July 2026;

60.3. for cadmium and its inorganic compounds - 0.004 mg/m³ until 11 July 2027.

[18 February 2021]

61. The requirement in relation to the occupational exposure limit value referred to in Paragraph 219.¹ of Annex 1 to this Regulation for exhaust emissions from diesel engines shall come into force on 21 February 2023 but in the field of underground mining and constructions of tunnels shall come into force on 21 February 2026.

[18 February 2021 / The abovementioned amendment shall be included in the wording of the Regulation as of 21 February 2023]

Informative Reference to European Union Directives

[1 February 2011; 7 April 2015; 10 July 2018; 7 January 2020]

This Regulation contains legal norms arising from:

1) Commission Directive 91/322/EEC of 29 May 1991 on establishing indicative limit values by implementing Council Directive 80/1107/EEC on the protection of workers from the risks related to exposure to chemical, physical and biological agents at work;

2) Council Directive 98/24/EC of 7 April 1998 on the protection of the health and safety of workers from the risks related to chemical agents at work (fourteenth individual Directive within the meaning of Article 16(1) of Directive 89/391/EEC);

3) Commission Directive 2000/39/EC of 8 June 2000 establishing a first list of indicative occupational exposure limit values in implementation of Council Directive 98/24/EC on the protection of the health and safety of workers from the risks related to chemical agents at work;

4) Directive 2004/37/EC of the European Parliament and of the Council of 29 April 2004 on the protection of workers from the risks related to exposure to carcinogens or mutagens at work (Sixth individual Directive within the meaning of Article 16(1) of Council Directive 89/391/EEC);

5) Commission Directive 2006/15/EC of 7 February 2006 establishing a second list of indicative occupational exposure limit values in implementation of Council Directive 98/24/EC and amending Directives 91/322/EEC and 2000/39/EC; and

6) Commission Directive 2009/161/EU of 17 December 2009 establishing a third list of indicative occupational exposure limit values in implementation of Council Directive 98/24/EC and amending Commission Directive 2000/39/EC;

7) Directive 2014/27/EU of the European Parliament and of the Council of 26 February 2014 amending Council Directives 92/58/EEC, 92/85/EEC, 94/33/EC, 98/24/EC and Directive 2004/37/EC of the European Parliament and of the Council, in order to align them to Regulation (EC) No 1272/2008 on the classification, labelling and packaging of substances and mixtures;

8) Commission Directive (EU) 2017/164 of 31 January 2017 establishing a fourth list of indicative occupational exposure limit values pursuant to Council Directive 98/24/EC, and amending Commission Directives 91/322/EEC, 2000/39/EC and 2009/161/EU;

9) Directive (EU) 2017/2398 of the European Parliament and of the Council of 12 December 2017 amending Directive 2004/37/EC on the protection of workers from the risks related to exposure to carcinogens or mutagens at work;

10) Directive (EU) 2019/130 of the European Parliament and of the Council of 16 January 2019 amending Directive 2004/37/EC on the protection of workers from the risks related to exposure to carcinogens or mutagens at work;

11) Directive (EU) 2019/983 of the European Parliament and of the Council of 5 June 2019 amending Directive 2004/37/EC on the protection of workers from the risks related to exposure to carcinogens or mutagens at work;

12) Commission Directive (EU) 2019/1831 of 24 October 2019 establishing a fifth list of indicative occupational exposure limit values pursuant to Council Directive 98/24/EC and amending Commission Directive 2000/39/EC.

Prime Minister A. Kalvītis

Acting for the Minister for Welfare,
Minister for the Environment R. Vējonis

 

In Revised Version Submitted by the Ministry of Welfare

Annex 1
Cabinet Regulation No. 325
15 May 2007

Occupational Exposure Limit Values (OEV) of Chemical Substances in the Air of the Work Environment

[1 February 2011; 7 April 2015; 10 July 2018; 7 January 2020; 18 February 2021 / Paragraphs 77.¹, 110.¹, and 427.² of Annex and Paragraph 8 of the note section of Annex, and also amendments to Paragraphs 271 and 344 of Annex by which the occupational exposure limit value is specified shall come into force on 11 July 2021. The requirement in relation to the occupational exposure limit value referred to in Paragraph 77.¹ of Annex for the arsenic acid and its salts as well as for inorganic arsenic compounds in the field of copper smelting shall come into force on 11 July 2023. The requirement in relation to the occupational exposure limit value referred to in Paragraph 219.¹ of Annex for exhaust emissions from diesel engines shall come into force on 21 February 2023 but in the field of underground mining and constructions of tunnels shall come into force on 21 February 2026 and be included in the wording of the Regulation as of 21 February 2023. See Paragraphs 59, 60, and 61 of the Regulation]

No.	EINECS1	CAS2	Name of the substance (including synonyms)	Structural formula/sum formula	Occupational Exposure Limit Values (OEV)				Notes
					8 h		Short-term (15 min.)
					mg/m³	ppm (ml/m3)	mg/m³	ppm (ml/m3)
1.	200-835-2	75-05-8	Acetonitrile (cyanomethane)	CH3CN	70	40	-	-	Skin
2.		75-07-0	Acetaldehyde (ethanal)	CH3CHO	5	-	-	-
3.		50-78-2	Acetylsalicylic acid (2-acetoxybenzoic acid)		0.5	-	-	-
4.		98-86-2	Acetophenone (phenyl methyl ketone)		5	-	-	-
5.		75-86-5	Acetone cyanohydrin (?α-hydroxyisobutyronitrile 2-hydroxy-2-methylpropionitrile)		0.9	-	-	-
6.	200-662-2	67-64-1	Acetone (2-propanol, dimethyl ketone)	CH3COCH3	1210	500	-	-
7.		124-04-9	Adipic acid (1,4- butanedicarboxylic acid)	HOOC(CH2)4COOH	4	-	-	-
8.		626-86-8	Adipic acid monoethylester (1,4-butanedicarboxylic acid monoethylester)	HOOC(CH2)4COOCH2CH3	3	-	-	-
9.			Coal tar and pitch sublimates with average content of benzopyrene (CAS No. 50-32-8):
			* less than 0.075 %		0.2	-	-	-
			* 0.075-0.15 %		0.1	-	-	-
			* 0.15-0.3 %		0.05	-	-	-
10.	201-173-7	79-06-1	Acrylamide (propenoic acid amide)		0.1	-	-	-	Skin
11.		107-13-1	Acrylonitrile (cyanoethylene)	H2C=CH-CN	0.5	-	-	-	Auditory effect
12.	201-177-9	79-10-7	Acrylic acid (propenoic acid) propene-2 acid	H2C=CH-COOH	5	1.7	594	204
13.		376-84-1	Acrylic acid 1H, 1H, 5H-octafluoropenthyl ester (2,2,3,3,4,4,5,5- octafluoropenthyl acrylate 2-propenoic acid 2,2,3,3,4,4,5,5-octafluoropenthyl ester)	H2C=CHCOOCH2 (CF2)5 CF3	30	-	-	-
14.		103-11-7	Acrylic acid 2-ethylhexyl ester (2-propenoic acid 2-ethylhexyl ester 2-ethylhexyl acrylate)	H2C=CHCOOCH2 -CH(C2H5)(CH2)3CH3	1	-	-	-
15.		818-61-1	Acrylic acid 2-hydroxyethyl ester (2-hydroxyethyl acrylate)	H2C=CH-COOCH2CH2OH	0.5	-	-	-
16.		814-68-6	Acrylic acid chloroanhydride (acryloilchloride propenoyl chloride)	H2C=CH-COCl	0.3	-	-	-
17.	203-453-4	107-02-8	Acrolein (acrylaldehyde, 2-propenal)	H2C=CH-CHO	0.05	0.02	0.12	0.05
18.		107-95-9	β- alanine (3-aminopropanoic acid)	NH2CH2CH2COOH	10	-	-	-
19.	203- 470-7	107-18-6	Allyl alcohol (2-propene-1-ol)	CH2=CHCH2OH	4.8	2	12 1	5	Skin
20.		21645-51-2	Aluminium hydroxide	Al(OH)3	6	-	-	-
21.		24304-00-5	Aluminium nitride	AlN	6	-	-	-
22.		1344-28-1	Aluminium oxide	Al2O3
			* in the aerosol form of disintegration		6	-	-	-
			* in the mixture with nickel (up to 15 %), (electro-corundum)		4	-	-	-
23.		7429-90-5	Aluminium and alloys thereof (by aluminium)	Al	2	-	-	-
24.			Tin inorganic compounds	after Sn	2	-	-	-	-
25.	211- 047-3	628-63-7	Amyl acetate (pentyl acetate, pentyl ethanoate)	CH3COO(CH2)4CH3	270	50	540	100	-
26.		620-11-1	3-Amyl acetate (3-pentyl acetate, 3-pentyl ethanoate)	CH3COOCH(C2H5)2	270	50	540	100	-
27.		625-16-1	tert-amyl acetate acetic acid 2-methyl-2-butylester (tert-pentyl acetate)	CH3COOC(CH3)2C2H5	270	50	540	100	-
28.		110-53-2	Amyl bromide (pentyl bromide)	CH3(CH2)4Br	0.3	-	-	-
29.		638- 49-3	Amyl formate (pentyl formate, formic acid pentyl ester)	HCOOC5H11	10	-	-	-
30.		71-41-0	Amyl alcohol (1-pentanol)	CH3(CH2)3CH2OH	10	-	-	-
30.1	200-521-5	61-82-5	Amitrole (1,2,4-triazol-3-amine)	C2H4N4	0.2
31.			Amines, alyphatic (alkyl amines)	H2N-R, R ≥ C7	1	-	-	-
32.		1918-02-1	4-Amino-3,5,6-trichloropicolinic acid (4-Amino-3,5,6-trichloropyridine-2-carboxylic acid, tordon-22k, picloram)		2	-	-	-
33.		3060-41-1	3-Amino-4-phenylbutyric acid hydrochloride (phenibute)		1	-	-	-
34.		6928-85-4	1-Amino-4-methylpiperazine (4-methylpiperazine-1amine)		2	-	-	-
35.	205-483-3	141-43-5	2-Aminoethanol (monoethanolamine)	NH2CH2CH2OH	0.5	0.2	7.6	3	Skin
36.		111-41-1	2-(2-Aminoethylamino) ethanol	NH2CH2CH2NHCH2CH2OH	3	-	-	-
37.		591-27-5	3-aminophenol		1	-	-	-
38.		123-30-8	4-aminophenol		1	-	-	-
39.		929-17-9	7-Aminoheptanoic acid	H2N(CH2)6COOH	8	-	-	-
40.			AMINOACIDS
		56-41-7	L-alanine (2-aminopropionic acid ?α-aminopropionic acid)	CH3CH(NH2)COOH	5	-	-	-
41.		74-79-3	Arginine (2-amino-5-guanidinovaleric acid)		10
42.		56-84-8	Aspartic acid (2-aminosuccinic acid)	HOOCCH2CH(NH2)COOH	10
43.		52-90-4	Cysteine (2- amino -3-mercaptopropanoic acid, α - amino- β -mercaptopropionic acid)	HSCH2CH(NH2)COOH	2
44.		56-89-3	Cystine (3,3'-Dithiobis-2-aminopropanoic acid, 2-amino-3-(2-amino-2-carboxyethyldisulfanyl) propanoic acid)		2
45.		63-91-2	Phenylalanine (2-amino-3-phenyl-propanoic acid, α - amino- β -phenylpropionic acid)	C6H5-CH2 CH(NH2)COOH	5
46.		56-40-6	Glycine (aminoacetic acid)	NH2CH2COOH	5
47.		56-86-0	Glutamic acid (1-amino-propane-1,3-dicarboxylic acid)	HOOCCH2CH2CH(NH2)COOH	10
48.		71-00-1	Histidine (2-amino-3-(4-imidazolyl)propanoic acid)		5
49.		73-32-5	Isoleucine (2-amino-3-methyl-pentanoic acid α-amino- β -methylvaleric acid)		5
50.		61-90-5	Leucine (2-amino-4-methyl-pentanoic acid, α - aminoisocaproic acid)	(CH3)2CHCH2CH(NH2)COOH	5
51.		56-87-1	Lysine 2,6-diaminohexanoic acid,? α, ε diaminocaproic acid	NH2(CH2)4CH(NH2)COOH	5
52.		63-68-3	Methionine (2-amino-4-methylmercaptobutyric acid, α - amino-g-methylthiobutyric acid)	CH3SCH2CH2CH(NH2)COOH	5
53.		98-79-3	5-Oxoproline (glutamic acid 5-lactam pyrrolidone-5-carboxylic acid)		5
54.		147-85-3	Proline (2-pyrrolidinecarboxylic acid)		5
55.		56-45-1	Serine (2-amino-3-hydroxypropanoic acid)	HOCH2CH(NH2)COOH	5
56.		60-18-4	Tyrosine (2-amino-3-(4-hydroxyphenyl)-propanoic acid, 3-(4-hydroxyphenyl)alanine)		2
57.		72-19-5	Threonine (2-amino-3-hydroxy-butanoic acid)	CH3CH(OH)CH(NH2)COOH	2
58.		73-22-3	Tryptophan (2-amino-3-(3-indolyl)propanoic acid)		2
59.		72-18-4	Valine (2-amino-3-methyl-butanoic acid)	(CH3)2CHCH(NH2)COOH	5
60.		7783-28-0	Ammophos (ammonium hydrogen phosphate and dihydrogen phosphate mixture, diammonium hydrogen orthophosphate)	NH4H2PO4, (NH4)2HPO4	6
61.		16919-58-7	Ammonium (IV)hexachloroplatinate	(NH4)2[PtCl6]	0.005
62.		1309-32-6	Ammonium hexafluorosilicate (after fluorine)	NH4SiF6	0.2
63.		12125-02-9	Ammonium chloride	NH4Cl	10
64.		1762-95-4	Ammonium rodanide (ammonium thiocyanate)	NH4SCN	5
65.	213-695-2	1002-89-7	Ammonium stearate	[CH3(CH2)16COO]NH4	2
66.		7773-06-0	Ammonium sulfamate	NH4SO3NH2	10
67.		7783-18-8	Ammonium thiosulphate	(NH4)2S2O3	10
68.	231-635-3	7664-41-7	Ammonia	NH3	14	20	36	50
69.		69-53-4	Ampicillin (adobacillin, Aminophenylmethyl-penicillin, aminobenzylpenicillin)	C16H20N3O4S	0.1
70.		5907-38-0	Analgine (sodium [(2-phenyl-1,5-dimethyl-3-oxo-2,3-dihydro-1H-pyrazol-4-yl)-methyl-amino]methanesulfonate)		0.5
71.			Anaesthetic gases (halothane, sevoflurane, isoflurane, enflurane, desflurane, and other haloalkanes)		20	2
72.	200-539-3	62-53-3	Aniline (aminobenzene, phenylamine)		7.74	2	19.35	5	Skin
73.		104-94-9	Anisidine (p-anisidine; 4-amino-1-methoxybenzene, 4-methoxyaniline)		1
74.		7440-36-0	Antimony metallic dust	Sb	0.2		0.5
75.		1309-64-4	Antimony trioxide (recalculating into antimony)	Sb2O3	1
76.	215-237-7	1314-60-9	Antimony pentoxide (recalculating into antimony)	Sb2O5	2
77.			Arsenic inorganic compounds (after arsenic)	(As)	0.01		0.04
77.1			Arsenic acid and its salts as well as inorganic arsenic compounds		0.015
78.		12001-29-5	Asbestos	3 MgOx2 SiO2x2 H2O	0,1 sol. /cm3 air
79.		109-52-4	Valeric acid (pentanoic acid)	CH3CH2CH2CH2COOH	5
80.		12253-23-5	Barium aluminate	BaAl2O4	0.1
81.			Barium aluminosilicate	BaAl2Si2O8	0.5		1
82.		52869-91-7	Aluminum barium titanate		0.5
83.		23436-05-7	Barium borate (orthoboric acid barium salt)	Ba3(BO3)2	0.5
84.		13718-55-3	Barium chloride fluoride (luminophores P - 385)	BaClF	0.1
85.		7787-32-8	Barium fluoride	BaF2	0.1
86.		10048-98-3	Barium hydrogenorthophosphate (barium hydrogen phosphate)	BaHPO4	0.5
87.		52869-93-9	Barium calcium titanate	BaCaTi2O6	0.5
88.		513-77-9	Barium carbonate	BaCO3	0.5
89.		13462-86-7	Barium sulfate (barite)	BaSO4	6
90.			Barium soluble compounds	after Ba	0.5				Skin
91.		125693-49-4	Barium tetratitanate	BaTi4O9	0.5
92.		12047-27-7	Barium titanate (IV)	BaTiO3	0.5
93.		103-83-3	Benzyldimethylamine	C6H5CH2N(CH3)2	5
94.		50-32-8	Benz(a)pyrene (benzo[def]chrysene)		0.00015
95.		100-52-7	Benzaldehyde	C6H5CHO	5
96.		140-11-4	Benzyl acetate (acetic acid, benzyl ester)	CH3COOCH2C6H5	5
97.		100-44-7	Benzyl chloride (α-chlorotoluene)	C6H5CH2Cl	5
98.		98-87-3	Benzylidene chloride (α,α-dichlorotoluene, benzal chloride, dichloromethylbenzene)	C6H5CHCl2	0.5
99.		69-57-8	Benzylpenicillin (6-phenylacetamido penicillinic acid sodium salt)		0.1
100.		100-51-6	Benzyl alcohol (phenylmethanol, phenylcarbinol)	C6H5CH2OH	5
101.		8030-30-6	Petroleum spirits (fuel)		100
102.		106-51-4	1,4- benzoquinone (p- benzoquinone)		0.05
103.		98-88-4	Benzoyl chloride (benzoic acid chloroanhydride)	C6H5COCl	5
104.	200-753-7	71-43-2	Benzene	C6H6	3.25	1			Skin
105.		528-44-9	1,2,4-benzenetricarboxylic acid (trimellitic acid)		0.1
106.		100-47-0	Benzonitrile (cyanobenzene)	C6H5CN	1
107.		65-85-0	Benzoic acid	C6H5COOH	5
108.		87-25-2	Benzoic acid 2-amino- ethyl ester (ethyl 2-aminobenzoate)	C6H5COOCH2CH2NH2	5
109.		95-14-7	Benzotriazole		5
110.		7440-41-7	Beryllium and its compounds	After Be	0.001
110.1			Beryllium and inorganic beryllium compounds		0.00025				Substance may cause skin or respiratory sensitisation
111.		13684-63-4	Betanal (phenmedipham, 1-pyridylacetic acid betaine, 1-carboxymethyl pyridinium betaine)		0.5
112.		92-52-4	Biphenyl (diphenyl)		10
113.		366-18-7 and 553-26-4	2,2'- bipyridyl and 4,4'-bipyridyl 2,2'-bipyridine and 4,4'-bipyridine, 2,2'-dipyridyl and 4,4'-dipyridyl)		0.2
114.		7440-69-9	Bismuth and its inorganic compounds	After Bi	0.5
115.		12069-32-8	Boron carbide	B4C	6
116.		10043-11-5	Boron nitride	BN	6
117.		7637-07-2	Boron fluoride (boron trifluoride)	BF3	1
118.		10043-35-3	Boric acid	H3BO3	10
119.		63428-82-0	Boverin (mixture of isomers)		0.3
120.	231-778-1	7726-95-6	Bromine	Br2	0.7	0.1
121.		353-59-3	Bromochlorodifluoromethane (freon 12Br difluorochlorobromomethane)	CBrClF2	1000
121.1	209-800-6	593-60-2	Bromoethylene		4.4	1
122.		95-56-7 and 106-41-2	Bromophenol, o- and p-isomers		0.3
123.		107-81-3	2-bromopentane	CH3CHBrCH2CH2CH3	5
124.		75-63-8	Bromotrifluoromethane (trifluorobromomethane, freon 13 B1)	F3BrC	3000
125.	233-113-0	10035-10-6	Hydrobromic acid	HBr	-	-	6.7	2	-
126.	201-159-0	78-93-3	2-Butanone (methylethylketone, ethylmethylketone)	CH3CH2COCH3	200	67	900	300	-
127.	203-450-8	106- 99-0	1,3-butadiene	CH2=CH-CH=CH2	2.2	1
127.1	203-788-6	110-65-6	But-2-yn 1,4-diol (1,4-butynediol)	C4H6O2/OHCH2CCCH2OH	0.5
128.		106-97-8	Butane	CH3CH2CH2CH3	300
129.	205-480-7	141-32-2	n-Butyl acrylate	CH2=CHCOO(CH2)3CH3	11	2	53	10	-
130.		109-73-9	Butylamine	CH3CH2CH2CH2NH2	10
131.		109-65-9	Butyl bromide (1-bromobutane)	CH3CH2CH2CH2Br	0.3
132.		75-91-2	tert-Butyl hydroperoxide		5
133.		109-69-3	Butyl chloride (1-chlorobutane)	CH3CH2CH2CH2Cl	0.5
134.		111-36-4	Butyl isocyanate	CH3CH2CH2CH2N=C=O	1
135.		97-88-1	Butyl methacrylate (2-propenoic acid, 2-methyl-, butyl ester)	CH2=C(CH3)COOC4H9	30
136.		628-28-4	Butyl methyl ether	CH3OC4H9	100
137.			Butyl alcohol (primary, secondary, tertiary)		10
		71-36-3	(n-butanol,	CH3CH2CH2CH2OH
			1-butanol,
		78-92-2	2-butanol,	CH3CH2CH(OH)CH3
		75-65-0	2-methyl-propan-2-ol,	(CH3)3COH
			tert-butanol,
		78-83-1	2-methyl-propan-1-ol,	(CH3)2CHCH2OH
			iso-butyl alcohol)
138.		111-34-2	Butyl vinyl ether	CH2=CHOC4H9	20
139.	203-905-0	111-76-2	2-butoxyethanol, (ethyleneglycol monobutyl ether, Butyl cellosolve)	HOCH2-CH2-O-C4H9	98	20	246	50	Skin
140.	203-933-3	112-07-2	2-butoxyethyl acetate (ethyleneglycol monobutyl ether acetate,butyl glycol acetate)	CH3COOCH2CH2O(CH2)3CH3	133	20	333	50	Skin
141.	203-961-6	112-34-5	2-(2-butoxyethoxy)ethanol (butyl diglycol)	HOC2H4OCH2CH2O(CH2)3CH3	67.5	10	101.2	15
142.		61-24-5 525-94-0 28393-42-2	Cephalosporin C; Penicillin N (cephalosporin N); cephalosporin P;	C16H21N3O8S C14H21N3O6S C33H50O8	0.3
143.		9004-34-6	Wood pulp		2
144.		65997-15-1	Cement (Portland cement)		6
145.		7758-88-5	Cerium (III) fluoride	CeF3	0.5		2.5
146.		1306-38-3	Cerium dioxide	CeO2	5
147.		21351-79-1	Caesium hydroxide	CsOH	0.3
148.	206-992-3	420-04-2	Cyanamide (carbamonitrile)	H2NCN	1	0.58	-	-	Skin
149.	200-821-6	74-90-8	Hydrogen cyanide (hydrocyanic acid)	HCN	0.3	0.27	5	4.5	Skin
150.	203-631-1	108-94-1	Cyclohexanone		40.8	10	81.6	20	Skin
151.		100-64-1	Cyclohexanone oxime		10
152.	203-806-2	110-82-7	Cyclohexane		80	23
153.		108-91-8	Cyclohexylamine		1
154.			Cymol (2,3,4- mixture of isomers or separate isomers) (2-isopropyltoluene o-cymol 3-isopropyltoluene m-cymol 4-isopropyltoluene p-cymol)		10
155.		12122-67-7	Zincethylene-N,N'-bisdithiocarbamate (N,N'-ethanediylbis-dithiocarbamic acid zinc salt, zineb, cuprozan)		0.5
156.		1314-84-7	Zinc phosphide (trizinc diphosphide)	Zn3P2	0.1
157.		10192-46-8	Zinc hexaborate (diboron trizinc hexaoxide)	Zn2B6O11	1
158.		1314-13-2	Zinc oxide	ZnO	0.5
159.		1314-98-3	Zinc sulphide	ZnS	5
160.		112-30-1	n-Decyl alcohol (1-decanol)	CH3(CH2)8CH2OH	10
160.1	207-069-8	431-03-8	Diacetyl (butanedione, dimethyl diketone)	CH3COCOCH3	0.07	0.02	0.36	0.1
161.		131-17-9	Diallyl phthalate (1,2-benzenedicarboxylic acid, di-2-propenyl ester)		1
162.		83968-18-7	Dialkylphthalate (1,2-benzenedicarboxylic acid, dialkyl esters)		1
163.		2687-25-4	2,3 Diaminotoluene (toluene-2,3- diamine)		2
164.		1303-86-2	Diboron trioxide	B2O3	5
165.		105-99-7	Dibutyl adipinate (adipic acid dibutyl ester, hexanedioic acid dibutyl ester, 1,4-butane dicarbonic acid dibutyl ester)	C4H9OOC(CH2)4COOC4H9	5
166.		2528-36-1	Dibutyl phenylphosphate (phosphoric acid, dibutyl phenyl ester)		0.1
167.		84-74-2	Dibutyl phthalate DBP, 1,2-benzenedicarboxylic acid dibutyl ester)	C6H4(COOC4H9)2	0.5
168.		502-56-7	Dibutyl ketone	CH3(CH2)3CO(CH2)3CH3	20
169.		109-43-3	Dibutyl sebacinate (sebacic acid dibutyl ester, decanedioic acid dibutyl ester)	C4H9OOC(CH2)8COOC4H9	10
170.	203-716-3	109-89-7	Diethylamine	(C2H5)2 NH	15	5	30	10	-
171.		111-46-6	Diethylene glycol 2,2'-oxybisethanol, 2,2'-dihydroxydiethyl ether)	HOCH2CH2-O-CH2CH2OH	10
172.	200-467-2	60-29-7	Diethyl ether	C2H5-O-C2H5	308	100	616	200	-
173.		84-66-2	Diethyl phthalate (1,2-benzenedicarboxylic acid, diethyl ether)	C6H4(COOC2H5)2	0.5
174.		82-66-6	Diphenacin (diphenylacetyl-1,3-Indandion, ratindan, diphacinone)		0.01
175.			Diphenyls, chlorinated		1
175.1	202-981-2	101-84-8	Diphenyl ether (phenylene ether, phenoxybenzene)	C6H5OC6H5	7	1	14	2
176.		76-12-0	1,2-Difluoro-1,1,2,2-tetrachloroethane (tetrachlorodifluoroethane, freon -112)	Cl2FC-CFCl2	1000
177.		75-71-8	Dichloro-difluoro-methane (Freon 12)	CCl2F2	3000
178.		624-72-6	1,2-Difluoroethane, (Freon 152)	FH2C-CH2F	3000
179.		25497-29-4	1,2-Difluorochloroethane (Freon 142)	FH2C-CHClF	3000
180.	200-871-9	75-45-6	Difluorochloromethane	CHClF2	3600	1000	-	-
181.		886-77-1	Difurfurylideneacetone		10
182.	202-425-9	95-50-1	1,2-Dichlorobenzene, (o-dichlorobenzol)	C6H4Cl2	122	20	306	50	Skin
183.		541-73-1	1,3-Dichlorobenzene (m-dichlorobenzol)	Cl2C6H4	20
184.	203-400-5	106-46-7	1,4-dichlorobenzene, (p-dichlorobenzene)	C6H4Cl2	12	2	60	10	Skin
185.	200-863-5	75-34-3	1,1-dichloroethane	CH3CHCl2	412	100	-	-	Skin
186.	203-458-1	107-06-2	1,2-dichloroethane (ethylene dichloride)	C2H4Cl2	8.2	2			Skin
187.		79-43-6	Dichloroacetic acid	Cl2CHCOOH	4
188.		102-36-3	3,4-Dichlorophenyl isocyanate		0.3
189.		149-74-6	Dichloro-phenyl-methyl-silane (after HCL)	C6H5SiCl2CH3	1
190.		27137-85-5	2,5-Dichlorophenyltri-chlorosilane	Cl2C6H3-SiCl3	1
191.		84-69-5	Diisobutyl phthalate (1,2-benzenedicarboxylic acid, diisobutylester)	C6H4(COOC4H9)2	1
192.	204-697-4	124-40-3	Dimethylamine	(CH3)2NH	3.8	2	9, 4	5	-
193.		1149-23-1	2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylic acid diethyl ester (2,6-dimethyl-3,5-diethoxycarbonyl-1,4-dihydropyridine, diludine, diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate)		2
194.	204-826-4	127-19-5	N,N-Dimethylacetamide	CH3CON(CH3)2	36	10	72	20	Skin
195.		108-01-0	2-(Dimethylamino) ethanol (N,N-dimethyl-2-hydroxyethylamine, N,N-dimethylethanolamine)	(CH3)2NCH2CH2OH	5
196.		121-69-7	N,N-Dimethylaniline (N,N-dimethylphenylamine)	(CH3)2N-C6H5	0.2
197.		103-83-3	N,N-Dimethylbenzylamine	C6H5CH2N(CH3)2	5
198.		80-15-9	α α Dimethylbenzylhydroperoxide (Cumolhydroperoxide)	C9H12O2	1
199.	204-065-8	115-10-6	Dimethyl ether	CH3-O-CH3	1920	1000	-	-	-
200.		576-26-1	2,6-Dimethylphenol (2,6-Xylenol)		2
201.		68-12-2	N,N-dimethylformamide	HCON(CH3)2	15	5	30	10	Skin
202.		131-11-3	Dimethyl phthalate (1,2-benzenedicarboxylic acid, dimethyl ester)	C6H4(COOCH3)2	0.3
203.		106-79-6	Dimethyl sebacate (1,8-octanedicarboxylic acid dimethyl ester, decanedioic acid dimethyl ester, sebacic acid, dimethyl ester)	CH3OOC(CH2)8COOCH3	10
204.		77-78-1	Dimethyl sulphate	(CH3)2SO4	0.1
205.		75-18-3	Dimethyl sulphide	H3C-S-CH3	50
206.		120-61-6	Dimethyl terephthalate (1,4-benzenedicarboxylic acid, dimethyl ester)		0.1
207.		110-71-4	1,2-dimethoxyethane (ethylene glycol dimethyl ether)	CH3OCH2CH2OCH3	10
208.	203-714-2	109-87-5	Dimethoxymethane (formaldehyde dimethylacetal, methylal)	CH3OCH2OCH3	10
209.		528-29-0	1,2-dinitrobenzene	C6H4(NO2)2	1
210.		99-65-0	1,3-dinitrobenzene	C6H4(NO2)2	1
211.		100-25-4	1,4-dinitrobenzene	C6H4(NO2)2	1
212.		25550-58-7	2,4-dinitrophenol		0.5
213.		27478-34-8	Dinitronaphthalene (mixture of 1,5- and 1,8- isomers)	C10H6(NO2)2	1
214.		121-14 -2, 606-20-2, 610 -39-9	Dinitrotoluene (2, 4- and 2,6- and 3,4-isomers)	(NO2)2C6H3CH3	1
215.		84-76-4	Dinonylphthalate (1,2-benzenedicarboxylic acid, dinonyl ester)		1
216.		123-91-1	1,4-dioxane		20	5.5
217.		122-62-3	Dioctyl sebacate (octan-1,8-dicarboxilic acid dioctyl ester, sebacic acid dioctyl ester, bis(2-ethylhexyl) sebacate)	C8H17OOC(CH2)8COOC8H17	10
218.		142-84-7	Dipropylamine	(CH3CH2CH2)2NH	2
219.		1335-47-3	Ditolylmethane	(CH3C6H4)2CH2	1
220.		112-53-8	Dodecyl alcohol (dodecan-1-ol, lauryl alcohol)	CH3(CH2)10CH2OH	10
221.		25991-86-0	dodecahydr-1,1'- carbonyl-bis-1H-azepin bis-azepan-1-ylmethanone, bis-N,N'-hexamethylene urea, carboxide (pesticide))		0.5
222.		13463-40-6	Iron pentacarbonyl (pentacarbonyliron)	Fe(CO)5	0.1
223.			Iron ore (iron agglomerate)		4
224.		7439-97-6	Mercury and its inorganic compounds (after mercury)	Hg	0.02				Auditory effect
224.1		21908-53-2	Mercuric oxide (after mercury)	HgO	0.02
224.2		7487-94-7	Mercuric chloride (after mercury)	HgCl2	0.02
225.		107-15-3 + 58-55-9	Elixophylline (theophylline + 1,2 ethylenediamine)		0.5
226.	203-439-8	106-89-8	Epichlorohydrin (3-chloro-1,2-epoxypropane, 1-chloro-2,3-epoxypropane)	C3H5ClO	1.9				Skin
227.			Epoxide resins (after epichlorohydrin)		0.5
228.		75-08-1	Ethanethiol (ethyl mercaptan)	C2H5SH	1
229.		94-19-9	Etazole amino-N-(5-ethyl-[1,3,4]thiadiazol-2-yl)-benzenesulfonamide, sulfaethidiole, sulfaethylthiadiazole)		1
230.		108-24-7	Acetic acid anhydride	CH3CO-O-COCH3	5
231.	204-658-1	123-86-4	Acetic acid butyl ester (n-butyl acetate)	CH3COOC4H9	241	50	723	150
232.	205-500-4	141-78-6	Acetic acid ethyl ester (ethyl acetate)	CH3COOC2H5	200	54	1468	400
233.		140-88-5	Ethyl acrylate (2-propenoic acid ethyl ester, acrylic acid ethyl ester)	H2C=CH-COOC2H5	10
234.	200- 834-7	75-04-7	Ethylamine	C2H5NH2	9.4	5	-	-	-
235.	202-849-4	100-41-4	Ethylbenzene	C6H5C2H5	442	100	884	200	Skin; Auditory effect
236.		74-96-4	Ethyl bromide (bromoethane)	CH3CH2Br	5
237.		110-80-5	Ethyl cellosolve (ethylene glycol monoethyl ether, 2-ethoxyethanol)	C2H5-O-CH2CH2OH	8	2			Skin
238.		107-15-3	Ethylenediamine (1,2-diaminoethane)	NH2CH2CH2NH2	2
238.1	203-444-5	106-93-4	Ethylene dibromide	C2H4Br2	0.8	0.1			Skin
239.	203-473-3	107-21-1	Ethylene glycol, (1,2-ethanediol)	HOCH2-CH2OH	52	20	104	40	Skin
240.		818-61-1	Ethyleneglycol monoacrylester (propenoic acid 2-hydroxyethyl ester)	CH2=CHCOOCH2CH2OH	0.5
241.		151-56-4	Ethyleneimine (aizirdine)		0.02
242.	200-849-9	75-21-8	Ethylene oxide (oxirane)		1	0.55			Skin
243.		74-85-1	Ethylene	CH2=CH2	100
243.1	203-234-3	104-76-7	2-ethylhexan-1-ol (2-Ethyl-1-hexanol, 2-ethylhexyl alcohol)	CH3(CH2)3CH(CH2CH3)CH2OH	5.4	1
244.	200-830-5	75-00-3	Ethyl chloride (chloroethane)	CH3CH2Cl	50	19	268	105
245.			N-butyl-N-ethyl-S-propylthiocarbamate (tillam)	(C2H5)N(C4H9)C(O)SC3H7	1
246.		64-17-5	Ethyl alcohol (ethanol)	C2H5OH	1000
247.	200-580-7	64-19-7	Acetic acid (ethanoic acid)	CH3COOH	25	10	50	20
247.1		111-15-9	2-ethoxyethyl acetate	C6H12O3	11	2			Skin
248.		106-74-1	2-ethoxyethyl acrylate (acrylic acid 2-ethoxyethyl ester 2-propenoic acid 2-ethoxyethyl ester)	CH2=CHCOOCH2CH2OC2H5	5
249.		85-01-08	Phenanthrene		0.8
250.	202-705-0	98-83-9	2-phenylpropene (isopropylbenzene, α-methylstyrene)	C6H5C(CH3)=CH2	246	50	492	100	-
251.		80-15-9	2-phenyl-2-propylhydroperoxide (cumene hydroperoxide, cumyl hydroperoxide, isopropylbenzene hydroperoxide, α,α-dimethylbenzyl hydroperoxide)		1
252.		58-15-1	2-phenyl-4-dimethylamino-1,5-dimethyl-1,2-dihydropyrazol-3-one (amidopyrin, piramidon)		0.5
253.		140-29-4	Phenylacetonitrile (benzyl cyanide)	C6H5CH2CN	0.8
254.		6017-21-6	Phenylazomalondinitrile (2-phenylazomalononitrile, Phenylhydrazonomalononitrile)	C6H5-N=NCH(CN)2	0.1
255.		108-45-2	m-Phenylene diamine (1,3-phenylenediamine)		0.1
256.		95-54-5	o-phenylenediamine (1,2-phenylenediamine)		0.5
257.		106-50-3	p-phenylenediamine (1,4-phenylenediamine)		0.05
258.		3006-93-7	N, N'-1,3-Phenylenedimaleimide (N,N'-(m-phenylene) disuccinimide, 1,1'-(1,3-Phenylene)bis(1H-pyrrole-2,5-dione))		1
259.		103-71-9	Phenyl isocyanate	C6H5N=C=O	0.5
260.		1007-36-9	N-Phenyl-N'-methylurea	C6H5NHCONHCH3	3
261.		122-59-8	Phenoxyacetic acid	C6H5OCH2COOH	1
262.		713-68-8	m-Phenoxyphenol (3-Phenoxyphenol)		1
263.	[1 February 2011]
264.	203-632-7	108-95-2	Phenol (hydroxybenzene)	C6H5OH	8	2	16	4	Skin
265.			Fluorides, inorganic	By F	2.5	-	-	-	-
266.	231-954-8	7782-41-4	Fluorine	F2	1.58	1	3.16	2	-
267.		430-57-9	1-Fluorine-1,2-dichloroethane (1,2-dichlorofluoro-ethane, freon 141)	HClFC-CClH2	1000
268.		75-69-4	Trichloro-fluoro-methane (Freon 11)	Cl3FC	1000
269.	231-634-8	7664-39-3	Hydrogen fluoride	HF	1.5	1.8	2.5	3	-
270.			Hydrofluoric acid salts (after F):
			* tin, ammonium, barium, zinc, potassium, lithium , sodium, silver fluorides, ammonium, hydrofluoride, trisodium hexafluoroaluminate,		0.2		1
			* aluminum, chrome, magnesium, calcium, strontium, copper		0.5		2.5
271.	200-001-8	50-00-0	Formaldehyde (methanal)	HCHO	0.37	0.3	0.74	0.6	Substance may cause skin sensitisation
272.	232-260-8	7803-51-2	Phosphine	PH3	0.14	0.1	0.28	0.2
273.	233-060-3	10026-13-8	Phosphorus (V) chloride (phosphorus pentachloride)	PCl5	1	-	-	-	-
274.	215-236-1	1314-56-3	Phosphorus (V) oxide, (diphosphorus pentaoxide, phosphorus pentaoxide)	P2O5	1	-	-	-	-
275.	233-046-7	10025-87-3	Phosphorus oxychloride (phosphoryl trichloride)	POCl3	0.064	0.01	0.12	0.02
276.	215-242-4	1314-80-3	Phosphorus(V) sulphide, (diphosphorus pentasulphide)	P4S10	1	-	-	-	-
277.		7719-12-02	Phosphorus trichloride	PCl3	0.2
278.	231-633-2	7664-38-2	Phosphoric acid (orthophosphoric acid)	H3PO4	1	-	2	-	-
279.		7723-14-0	Phosphorus	P	0.03
280.	200-870-3	75-44-5	Phosgen (carbonyl dichloride)	COCl2	0.08	0.02	0.4	0.1	-
281.		85-44-9	Phthalic anhydride (1,2-benzenedicarboxylic acid, anhydride)		1
282.		59-87-0	Furacilin (nitrofural, 5-nitrofuranyl semicarbazone)		0.5
283.		67-20-9	Furadonin (N-(5-Nitro-2-furfurylidene)-1-aminohydantoin, nitrofurantoin)		0.5
284.		1672-88-4	Furagin (N-[(5'-nitro-2'-furyl)acrylidene]-1-aminohydantoin, N-[2-(5'-nitrofuryl-2)-2-propenylidine]-1-amino-hydantoin)		5
285.		110-00-9	Furan		0.5
286.		67-45-8	Furazolidone (3-(5-nitrofurfurylidenamino)-2-oxazolidinone)		0.5
287.		98-00-0	Furfuryl alcohol (2-Hydroxymethylfuran)		0.5
288.		98-01-01	Furfural (2-formylfuran, 2-furancarboxaldehyde)		10
289.		357-70-0	Galantamine (herban, nururon, nivalin)	C17H21NO3	0.05
290.		12024-21-4	Gallium oxides	Ga2O3 un Ga2O	3
291.		10038-98-9	Germanium (IV) chloride (after germanium)	GeCl4	1
292.		1310-53-8	Germanium dioxide (germanium (IV) oxide)	GeO2	2
293.		7782-65-2	Germanium tetrahydride (germane)	GeH4	5
293.1	200-240-8	55-63-0	Glyceryl trinitrate (nitroglycerin)	C3H5(NO3)3	0.095	0.01	0.19	0.02	Skin
294.		111-30-8	Glutaraldehyd (glutaric acid dialdehyde, 1,5-pentanedial)	OHC(CH2)3CHO	5
295.		116-16-5	Hexachloroacetone (hexachloropropanone)	Cl3CCOCCl3	0.5
296.		118-74-1	Hexachlorobenzene	C6Cl6	0.9
297.		999-97-3	Hexamethyldisilazane	(CH3)3SiNHSi(CH3)3	2
298.		124-09-4	Hexamethylenediamine (1,6-hexanediamine, 1,6-diaminohexane)	(NH2CH2CH2CH2)2	0.1
299.		822-06-0	Hexamethylene diisocyanate (1,6-diisocyanatohexane)	OCN(CH2)6NCO	0.05
300.		111-49-9	Hexamethyleneimine (homopiperidine, perhydroazepine)		0.5
301.	203-777-6	110-54-3	n-Hexane	C6H14	72	20			Auditory effect
302.	205-563-8	142-82-5	n-Heptane	CH3(CH2)5CH3	350	85	2085	500	-
303.	203-767-1	110-43-0	2-Heptanone (methyl pentyl ketone, Methyl-amyl-ketone)	CH3-CO-C5H11	238	50	475	100	Skin
304.	203-388-1	106-35-4	3-Heptanone (ethylbutylcetone)	C2H5-CO-C4H9	95	20	-	-	-
305.		2499-58-3	Heptyl acrylate (propenoic acid, heptyl ester, acrylic acid, heptyl ester)	H2C=CHCOO(CH2)6CH3	1
306.		111-70-6	Heptyl alcohol (heptanol)	CH3(CH2)5CH2OH	10
307.		38066-16-9	Heterophos (O-ethyl O-phenyl S-propyl phosphorothioate, diethyl ((phenylthio)methyl)phosphonate)	C11H17O3PS	0.02
308.	206-114-9	302-01-2	Hydrazine	NH2NH2	0.013	0.01			Skin
308.1	262-967-7	61788-32-7	Hydrogen terphenyl (hydrogenated diphenylbenzenes)	(C6H7)3	19	2	48	5
309.		109-78-4	3-Hydroxypropionitrile (2-Cyanoethanol)		10
310.		31282-04-9	Hygromycin B (antihelmycin)	C20H37N3O13	0.001
311.		91-22-5	Quinoline		0.1		0.5
312.		627-30-5	3-Chloro-1-propanol (1-chloro-3-hydroxypropane, trimethylene chlorohydrin)	Cl(CH2)3OH	2
313.		19210-21-0	2-Chloro-1-propanol	CH3CH(Cl)CH2OH	2
314.		97-00-7	1-chloro-2,4-dinitro-benzene (2,4-dinitrochlorobenzene)		0.05
315.		127-00-4	1-Chloro-2-propanol (propylene chlorohydrin)	CH3CH(OH)CH2Cl	2
316.		118-97-8	4-chloro-3,5-dinitro-benzoic acid		1
317.	203-628-5	108-90-7	Chlorobenzene (monochlorbenzene)	C6H5Cl	23	5	70	15	-
318.		106-48-9	4-chlorophenol	ClC6H4OH	1
319.		01/10/1120	9-chlorononanoic acid (chloropelargonic acid)	ClCH2(CH2)7COOH	5
320.	200-663-8	67-66-3	Chloroform (trichloromethane)	CHCl3	10	2	-	-	Skin
321.		107-94-8	3-chloropropanoic acid	ClCH2CH2COOH	5
322.		598-78-7	2-chloropropanoic acid (α -chloropropionic acid)	CH3CH(Cl)COOH	2
323.	231-959-5	7782-50-5	Chlorine	Cl2	1	0.3	1.5	0.5
324.		57-62-5	Chlortetracycline	C22H23ClN2O8	0.1
325.		95-49-8 and 106-43-4	Chlorotoluene (o- and p-isomers)	CH3C6H4Cl	10
326.	231-595-7	7647-01-0	Hydrogen chloride	HCl	8	5	15	10	-
327.			Chrome, metallic (insoluble inorganic chromium (II) chromium (III) compounds)		2
328.		7789-04-0	Chromium (III) phosphate after chromium (chromium orthophosphate after chromium)	CrPO4	2
329.		1333-82-0	Chromium (VI) oxide (chromium trioxide)	CrO3	0.01
329.1			Chromium (VI) compounds		0.005				OEV 0.010 mg/m3 until 17 January 2025. OEV 0.025 mg/m3 for welding or plasma cutting processes or similar work processes producing vapours until 17 January 2025
330.			Chromium dihydrogen phosphate, after chromium	Cr(H2PO4)3	0.02
331.		10060-12-5	Chromium trichloride hexahydrate, after chromium	CrCl3. 6H2O	0.01
332.		1308-38-9	Chromium (III) oxide, after chromium	Cr2O3	1
333.		7783-20-2 + 7732-18-5	Chromium-ammonium sulphate, after Cr (chromium-ammonium alum)	Cr2(SO4)3. (NH4)2SO4. 24H2O	0.02
334.		24613-89-6	Chromates, (dichromates), after chromium	Me2CrO4 or Me2Cr2O7	0.01
335.	204-662-3	123-92-2	Isoamyl acetate (isopentyl acetate, acetic acid 3-methylbutyl ester, 3-Methylbutyl acetate, isopentyl ethanoate)	CH3COOCH2CH2CH(CH3)2	270	50	540	100	-
336.	204-633-5	123-51-3	Isoamylalcohol, (3-methyl-1-butanol, isopentyl alcohol)	(CH3)2CHCH2CH2OH	18	5	37	10
336.1	203-745-1	110-19-0	Isobutyl acetate	C6H12O2	241	50	723	150
337.		121-91-5	Isophthalic acid (1,3-Benzenedicarboxylic acid)		0.2
338.	201-142-8	78-78-4	Iso-pentane	H3C-CH2-CH(CH3)2	3000	1000
339.		78-79-5	Isoprene (2-methyl-1,3-butadiene)		40
340.		67-63-0	Isopropanol (2-propanol, isopropyl alcohol, 1-methyl-1-ethanol)	CH3CH(OH)CH3	350		600
341.	201-245-8	80-05-7	4,4'-Isopropylidenediphenol (bisphenol A)	(CH3)2C(C6H4OH)2	25	-	-	-
342.		7553-56-2	Iodine	I2	1
343.		2223-93-0	Cadmium stearate	(CH3(CH2)16COO)2Cd	0.1
344.			Cadmium and its inorganic compounds		0.0015; 8
345.		156-62-7	Calcium cyanamide	CaNCN	1
346.		7789-75-5	Calcium fluoride	CaF2	0.5		2.5
347.		7757-93-9	Calcium hydrogen phosphate	CaHPO4	10
348.	215-137-3	1305-62-0	Calcium hydroxide, (calcium dihydroxide)	Ca(OH))2	16	-	46
349.		7758-23-8	Calcium dihydrogen phosphate	Ca(H2PO4)2	10
350.		10043-52-4	Calcium chloride	CaCl2	2
351.		471-34-1	Calcium carbonate	CaCO3	6
352.			Calcium nickel chromium phosphate (after nickel)		0.005
353.	215-138-9	1305-78-8	Calcium oxide	CaO	16		46
353.1		7778-18-9	Calcium sulfate (hydrogenated; gypsum dust)	CaSO4x2H2O	4
354.			Potassium alkylxanthate, R=alkyl: isopropyl-, isobutyl-, isoamyl-e (potassium O-alkyldithiocarbonate, R-alkyl: isopropyl-, isobutyl-, isoamyl-)	KSCSO-R	1
355.		871-58-9	Potassium butylxanthate (Carbonic acid, dithio-, O-butyl ester)	KSCSO-C4H9	10
355.1	205-792-3	151-50-8	Potassium cyanide (after cyanide)	KCN	1		5		Skin
356.		140-89-6	Ethyl potassium xanthogenate (Potassium O-ethyl dithiocarbonate)	KSCSO-C2H5	0.5
357.		16871-90-2	Potassium fluorosilicate (after fluorine) (dipotassium hexafluorosilicate)	K2[SiF6]	0.2
358.		14459-95-1	Tetrapotassium hexacyanoferrate (II) (yellow prussiate of potash)	K4[Fe(CN)6]	4
359.		13746-66-2	Tripotassium hexacyanoferrate (III) (red prussiate)	K3[Fe(CN)6]	4
360.		3811-04-09	Potassium chlorate	KClO3	5
361.		7447-40-7	Potassium chloride	KCl	5
362.		584-08-7	Potassium carbonate	K2CO3	2
363.		7757-79-1	Potassium nitrate	KNO3	5
364.		7778-80-5	Potassium sulphate	K2SO4	10
365.		21368-68-3	Camphor (DL-bornan-2-one, 1,7,7-trimethylbicyclo(2,2,1)heptan-2-one)	C10H16O	3
366.	203-313-2	105-60-2	e - Caprolactam (dust and vapour) (eaminocaproic acid lactam)		10	-	40	-	-
367.		142-62-1	Caproic acid (hexanoic acid)	CH3(CH2)4COOH	5
368.		655-35-6	Carbocromen (intencordin, Iintensain, ethyl -[[3-[2-(diethylamino)ethyl]-4-methyl-2-oxo-2H-1-benzopyran-7-yl]oxy]acetate hydrochloride)	C20H27NO5 . HCl	0.3
369.		1302-76-7	Kyanite (aluminium oxide with silicon dioxide admixture)	Al2O5Si	2
370.		50-29-3	Clofenotane (INN) (1,1,1-trichloro-2,2-bis (4-chlorophenyl)-ethane, dichloro-diphenyl-trichloroethane (DDT), p,p'-DDT (4,4'-DDT), 1,1-bis-(4-chlorophenyl)-2,2,2-trichloroethane)	(ClC6H4)2CHCCl3	0.1
371.			Cobalt hydrocarbonyl and cleavage product thereof (after Co)	Co(CO)4H	0.01
372.		1307-96-6	Cobalt II oxide	CoO	0.5
373.		1308-04-9	Cobalt III oxide	Co2O3	0.5
374.		7440-48-4	Cobalt	Co	0.5
375.		58-08-02	Caffeine (1,3, 7 - trimethylxanthine)		0.5
376.		8050-09-7	Colophony		4
377.			Dyes: vinyl sulphone and chloro thiasine		2
378.			Dyes: anthraquinone and phtalocyanine		5
379.			Dyes, alkaline: arylmethane		0.2
380.			Dyes, vat dyes: binaphthyl hexacarboxylic acid dianhydride derivatives		5
381.	215-293-2	1319-77-3	Cresol, (all isomers) (o-, m-, p-methylphenols, cresol mixture		22	5	-	-	-
382.		10453-89-1	Chrysanthemumic acid (2,2-Dimethyl-3-(2-methyl-1-propenyl) cyclopropane-1-carboxylic acid)		10
383.		437-74-1	Xanthinol nicotinate (7-[2-hydroxy-3-((2-hydroxyethyl)-N-methylamino] propyl) theophylline nicotinate)		1
384.	215-535-7	1330-20-7	Xylene (o-, m-, p-xylene, dimethylbenzene)		221	50	442	100	Skin
385.	203-576-3	108-38-3	m-xylene, (1,3-dimethylbenzene)	C8H10	221	50	442	100	Skin
386.	202-422-2	95-47-6	o-xylene, (1,2-dimethylbenzene)	C8H10	221	50	442	100	Skin
387.	203-396-5	106-42-3	p-xylene, (1,4-dimethylbenzene)	C8H10	221	50	442	100	Skin; Auditory effect
388.	202-704-5	98-82-8	Cumene (2-phenylpropane, isopropylbenzene, propylbenzene)		50	10	250	50	Skin
389.		25038-59-9	Lavsan (polyethylene terephtalate, terylene)		5
390.		9013-95-0	Levan (polysaccharide)	(C6H10O5)n	1
391.		56-75-7	Levomycetin		1
392.		8032-32-4	Ligroine (after C) Petroleum ether)		300
393.		64742-82-1	Ligroine (naphtha, Hydrodesulfurized heavy; naphtha treated with hydrogen with low boiling point) (white spirit, white spirit)		200		300
394.		9001-62-1	Lipase (triacylglycerol)		1
395.	231- 484-3	7580-67-8	Lithium hydride	LiH	-	-	0.025
396.		12007-25-9	Magnesium diboride (after boron)	MgB2	1
397.		10326-21-3	Magnesium chlorate	Mg(ClO3)2	5
398.		12230-32-9	Magnesium polyboride (Magnesium dodecaboride)	MgB12	6
399.			Magnesium- manganese ferrite	MgMn(FeO2)4	1
400.		108-31-6	Maleic anhydride (maleinanhydride, 1,2-ethylendicarbonic acid anhydride)		1
401.		1313-13-9	Manganese dioxide (disintegration aerosol)	MnO2	0.3
401.1			Manganese and its inorganic compounds (after manganese)		0.25 0.056
402.		07/05/3353	Manganese distearate	[CH3(CH2)16COO]2Mn	3
403.		12108-13-3	Manganese cyclopentadienyl tricarbonyl (Tricarbonyl(methylcyclopentadienyl)manganese)		0.1
404.		12427-38-2	Manganese, ethylene-N,N-bis-dithiocarbamate (maneb)		0.5
405.			Manganese-zinc ferrite	MnZn(FeO2)4	1
406.		7439-96-5	Manganese welding aerosol (condensation aerosol)		0.1
407.		8065-48-3	Mercaptophos (demeton, O,O-diethyl-O''-(2-ethylthioethyl) thiophosphate and O,O'-diethyl-S-(2-ethylthioethyl) thiophosphate mixture)	C2H5SCH2CH2OPS(OC2H5)2 un C2H5SCH2CH2SPO(OC2H5)2	0.02
408.		79-39-0	Methylacrylic amide (2-methylpropionic acid amide)	CH2=C(CH3)CONH2	1
409.		79-41-4	Methacrylic acid (2-2-methylpropionic acid)	CH2=C(CH3)COOH	10
410.		760-93-0	Methacrylic acid anhydride (2-methylpropenoic acid anhydride, methacrylic anhydride)		1
411.		920-46-7	Methacrylic acid chloroanhydride (methacrylic chloride, 2-methylpropenoic acid chloroanhydride)	CH2=C(CH3)COCl	0.3
412.		74-93-1	Methanethiol (methyl mercaptan)	CH3SH	0.8
413.	200-659-6	67-56-1	Methanol (methyl alcohol, carbinol)	CH3OH	260	200	-	-	Skin
414.		1569-50-2	3-Methyl-3-buten-1-ol (3-Penten-3-ol, 2,2-dimethylvinylcarbinols)		10
415.		80-59-1	2-methylbut-2-enoic acid 2-methylcrotonic acid, 2,3-dimethylacrylic acid)	CH3CH=C(CH3)COOH	5
416.		638-10-8	3-methylbut-2-enoic acid ethyl ester (3,3-dimethylacrylic acid ethyl ester, crotonic acid, 3-methyl-, ethyl ester)	(CH3)2C=CHCOOCH2CH3	10
417.		3425-61-4	2-hydroperoxy-2-methyl-butane (tert-Pentyl hydroperoxide)		5
418.		79-20-9	Methyl acetate (acetic acid, methyl ester)	CH3COOCH3	100
419.		96-33-3	Methyl acrylate (methyl propenoate, acrylic acid, methyl ester, propenoic acid, methyl ester)	CH2=CHCOOCH3	18	5	36	10
420.		74-83-9	Methyl bromide (bromomethane)	CH3Br	1
421.	210-946-8	626-38-0	1-Methylbutyl acetate, (1-methylbutyl ethanoate)	CH3COOCH(CH3)CH2CH2CH3	270	50	540	100	-
421.1	203-481-7	107-31-3	Methyl formate (formic acid methyl ester)	HCOOCH3	125	50	250	100	Skin
422.	203-737-8	110-12-3	5-Methyl-2-hexanone (isopentyl methyl ketone, isoamyl methyl ketone, isobutyl acetone)	(CH3)2CHCH2CH2COCH3	95	20	-	-	-
423.	208-793-7	541-85-5	5-Methyl-3-heptanone (ethylisoamylketone)	CH3CH2CH(CH3)CH2COCH2CH3	53	10	107	20	-
424.	203-550-1	108-10-1	4-Methyl-2-pentanone, (isobutyl methyl ketone, methylisobutylketone, isopropyl acetate)	CH3C(O)CH2CH(CH3)CH3	83	20	208	50	-
425.		872-50-4	1-Methyl-2-pyrrolidinone (N-Methyl-2-pyrrolidone)	C5H9NO	40	10	80	20	Skin
426.	208-601-1	534-52-1	2-methyl-4,6-dinitro-phenol (4,6-Dinitro-o-cresol, DNOC)	(CH3) C6H2(NO2)2OH	0.05
427.		74-95-3	Methylene bromide (dibromomethane)	CH2Br2	10
427.1	202-974-4	101-77-9	4,4'-methylenedianiline (4,4'-diaminodiphenylmethane)	C13H14N2	0.08				Skin
427.2	202-918-9	101-14-4	4,4'-methylene bis (2-chloroaniline)	C13H12Cl2N2	0.01				Skin
428.	200-838-9	75-09-2	Methylene chloride (dichloromethane)	CH2Cl2	120	34	150	42	Skin
429.	200-817-4	74-87-3	Methyl chloride (chloromethane)	CH3Cl	42	20
429.1	205-599-4	143-33-9	Sodium cyanide (after cyanide)	NaCN	1		5		Skin
430.		624-83-9	Methylisocyanate	CH3N=C=O			0.05	0.02
431.		563-80-4	Methyl isopropyl ketone (3-Methyl-2-butanone)	CH3C(O)C(CH3)CH3	200
432.		556-61-6	Methyl isothiocyanate	CH3N=C=S	0.1
433.		8022-00-2	Methyl mercaptophos (demeton-methyl, O,O'-dimethyl-O''-(2-ethylthioethyl) thiophosphate and dimethyl-S-(2-ethylthioethyl) thiophosphate mixture)	S=P(OCH3)2-O-(CH2)2S-C2H5 un S=P(OCH3)2-S-(CH2)2S-C2H5	0.1
434.		80-62-6	Methyl methacrylate 2-methyl-2-propenoic acid methyl ester, methyl 2-methylpropenoate)	CH2=C(CH3)COOCH3	10
435.		25013-15-4	Methylstyrene (mixed isomers) (vinyltoluene, vinylbenzene)	CH2=CH-C6H4CH3	50				Auditory effect
436.		98-83-9	α-Methylstyrene (2-phenylpropene)		5
437.		598-50-5	Methylurea (N-Methylurea)	CH3NHC(O)NH2	10
438.		78-94-4	Methyl-vinyl-ketone (3-butene-2-one)		0.1
439.			Welding aerosol		4
439.1		110-49-6	2-Methyoxyethyl acetate	C5H10O3		1			Skin
439.2		109-86-4	2-Methoxyethanol	C3H8O2		1			Skin
440.	203-603-9	108-65-6	2-methoxy-1-methylethyl acetate (propylene glycol monomethyl ether acetate)	CH3COOCH(CH3)CH2OCH3	275	50	550	100	Skin
441.	252-104-2	34590-94-8	Methoxyisopropoxy propanol (dipropylene glycol monomethyl ether, DMP)	CH3OC3H6OC3H6OH	308	50	-	-	Skin
442.	203-539-1	107-98-2	1-Methoxy-2-propanol (propylene glycol monomethyl ether, monopropylene glycol methyl ether)	CH3CH(OH)CH2OCH3	375	100	568	150	Skin
443.		586-37-8	m-Methoxyacetophenone (3-acetylanisole, 3-acetylmethoxybenzene)		3
444.	203-906-6	111-77-3	2-(2-methoxyethoxy)ethanol	C5H12O3	50.1	10			Skin
445.	203-604-4	108-67-8	Mesitylene (1,3,5-trimethylbenzene)		100	20	-	-	-
446.		79-11-08	Monochloroacetic acid (chloroacetic acid)	ClCH2COOH	1
447.		79-04-09	Monochloroacetic acid chloroanhydride (chloroacetyl chloride)	CH2ClCOCl	0.3
448.	203-815-1	110-91-8	Morpholine	C4H9NO	36	10	72	20
449.	202-049-5	91-20-3	Naphthalene		50	10	-	-	-
450.		8030-30-6	Petroleum		10
451.			Mineral oils, petroleum mineral oils		5
452.		1141-38-4	2,6-Naphthalenedicarboxylic acid		0.1
453.		93-09-4	2-Naphthalenecarboxylic acid (2-naphthoic acid)		0.1
454.		128-97-2	1,4,5,8-Naphthalenetetracarboxylic acid		0.5
455.		130-15-4	1,4-Naphthoquinone		0.1
456.		90-15-3	1-Naphthol (1-hydroxynaphthalene, α-naphthol)		0.5
457.		135-19-3	2-Naphthol (2-hydroxynaphthalene, β-naphthol)		0.1
458.	247-852-1	26628-22-8	Sodium azide	NaN3	0.1	-	0.3	-	Skin
459.		4312-97-4	Sodium cis- β -chloroacrylate (acrofol, cis-3-Chloroacrylic acid sodium salt, cis-3-chloropropenoic acid sodium salt, sodium 3-chloroacrylate)		0.5
460.		16893-85-9	Sodium hexafluorosilicate	Na[SiF6]	0.2
461.		144-55-8	Sodium hydrogencarbonate (baking soda)	NaHCO3	5
462.		1310-73-2	Sodium hydroxide (soda lye, caustic soda)	NaOH	0.5
463.		7775-09-09	Sodium chlorate	NaClO3	5
464.		7647-14-5	Sodium chloride	NaCl	5
465.		7758-19-2	Sodium chlorite	NaClO2	1
466.		137-42-8	Sodium N-methyldithiocarbamate (methyldithiocarbamate, methyldithiocarbamic acid, sodium salt, carbathione)	CH3-NH-C(S)SNa	0.1
467.		131-52-2	Sodium pentachlorophenolate	C6Cl5ONa	0.1
468.		10332-33-9	Sodium perborate monohydrate	NaBO3 . H2O	1
469.		10486-00-7	Sodium perborate tetrahydrate	NaBO3 . 4H2O	1
470.		540-72-7	Sodium rhodanide (sodium thiocyanate)	NaSCN	10
471.		7757-82-6	Sodium sulphate	Na2SO4	10
472.		1313-82-2	Sodium sulphide	Na2S	0.2
473.	207-343-7	463-82-1	Neopentane	C5H12	3000	1000
474.	200-193-3	54-11-5	Nicotine, (3-(1-Methyl-2-pyrrolidinyl) pyridine)		0.5	-	-	-	Skin
475.		59-67-6	Nicotinic acid (pyridine-3-carboxylic acid)		1
476.		98-92-0	Nicotine acid amide (pyridine-3-carboxylic acid amide, nicotinamide)		1
477.		7440-02-0	Nickel, nickel oxides, sulphides and compounds (after Ni)	Ni	0.05
478.		13977-71-4	Nickel chromophosphate	NiCr(H2PO4)6 . H2O	0.005
479.		13463-39-3	Nickel carbonyl (tetracarbonyl nickel)	Ni(CO)4	0.0005
480.		53025-58-4	Nitro		4
481.		88-74-4	2-nitroaniline (o-nitroaniline)		0.5
482.		99-09-2	3-nitroaniline (m-nitroaniline)		0.1
483.		100-01-6	4-nitroaniline (p-nitroaniline)		0.1
484.		100-17-4	4-nitroanisole (1-Methoxy-4-nitrobenzene)		3
485.	202-716-0	98-95-3	Nitrobenzene		1	0.2	-	-	Skin
486.		585-79-5	m-Nitrobromobenzene (1-Bromo-3-nitrobenzene)		0.1
487.	201-188-9	79-24-3	Nitroethane	CH3CH2NO2	30	9.6	312	100	Skin
488.		75-52-5	Nitromethane	CH3NO2	30
488.1	201-209-1	79-46-9	2-nitropropane		18	5
489.		88-72-2 99-08-1 99-99-0	Nitrotoluene (o-, m-, p-isomers)		3
490.		502-56-7	Nonan-5-one	CH3(CH2)7CO(CH2)3CH3	20
491.		143-08-8	Nonyl alcohol (nonanol)	CH3(CH2)7CH2OH	10
492.	204-696-9	124-38-9	Carbon dioxide	CO2	9000	5000	-	-	-
493.	211-128-3	630-08-0	Carbon (II) oxide (carbon monoxide, carbon monoxide gas)	CO	20	17	117	100	Auditory effect
494.			Carbon dust
			- coal, anthracite and other coal dust, petroleum, coke, bituminous shale, black industrial soot		4
			- natural and artificial diamonds, graphite		2
495.			Hydrocarbons, saturated aliphatic, C1-10 after C (alkanes)	CnH2n+2	100		300
496.		66-79-5	Oxacillin	C19H19N3O5S	0.05
497.		111-87-5	Octyl-alcohol (octanol)	CH3(CH2)6CH2OH	10
498.		7060-74-4	Oleandomycin phosphate	C35H61NO12.H3PO4	0.4
499.		10028-15-6	Ozone	O3	0.1
500.		422-64-0	Propanoic acid, pentafluoro-	CF3CF2COOH	2
501.	203-692-4	109-66-0	Pentane	C5H12	3000	1000
502.		8006-61-9	Kerosene		100		300
503.	201-865-9	88-89-1	Picric acid, (2,4,6-trinitrophenol)		0.1	-	-	-	-
504.	203-808-3	110-85-0	Piperazine (diethylenediamine)		0.1	-	0.3	-	-
505.		110-89-4	Piperidine		0.2
506.	232-319-8	8003-34-7	Pyrethrins and pyrethroids (pyrethrum (purified from sensitising lactones))	Multicomponent insecticide of plant origin	1	-	-	-	-
507.	203-809-9	110-86-1	Pyridine		15	5	-	-	-
508.		123-75-1	Pyrrolidine		0.1
509.	231-116-1	04/06/7440	Platinum (metal)	Pt	1	-	-	-	-
510.			Polymer dust: (polyamide, polyformaldehyde, polycaprolactam, polyethylene, polymers in the basis of which there are acrylic monomers, polypropene, polyurethane etc.)		5
511.		107-19-7	Propargyl alcohol (2-Propyn-1-ol)		1
511.1		74-98-6	Propene	CH3CH2CH3	1800	1000
512.	201-176-3	79-09-4	Propanoic acid (propionic acid)	C2H5COOH	31	10	62	20	-
513.		109-60-4	Propyl acetate (acetic acid, propyl ester)	CH3COOC3H7	200
514.		107-10-8	Propylamine (n-propylamine)	NH2C3H7	5
515.		108-32-7	Propylene carbonate (1,2-Propanediol cyclic carbonate)		2
516.			Propylene glycol monoacrylate	CH2=CHCOO-CH2-CH2OH-CH3	1
517.		57-55-6	propylene glycol (1,2-propanediol)	CH3CH(OH)CH2OH	7
518.	200-879-2	75-56-9	Propylene oxide (methyloxirane, 1,2-epoxypropane)		2.4	1
519.		115-07-1	Propylene (propene)	CH2=CH-CH3	100
520.		106-36-5	Propyl propionate (propionic acid propyl ester)	CH3CH2COOC3H7	70
521.		71-23-8	Propyl alcohol (1-propanol)	CH3CH2CH2OH	10
522.		123-38-6	Propionaldehyde (propanal)	CH3CH2CHO	5
523.			Dust of plant and animal origin:
			sugar dust		5
			grain dust		4
			cotton, linen, wool, piles etc. (with an admixture of silicon dioxide): * more than 10 % *less than 10 %		2 4
			flour dust		6
			wood dust		6
			peat dust		5
			hardwood dust7		2				OEV 3mg/m3 until 17 January 2023
			paper dust		2
		8037-19-2	tobacco dust		3
			tea dust		3
524.			Yeast (dry)		0.3
525.	203-585-2	108-46-3	Resorcinol (1, 3-dihydroxybenzene benzene-1,3-diol)		45	10	-	-	Skin
526.		83-88-5	Riboflavin (vitamin B2)	C17H20N4O6	1
527.		13292-46-1	Rifampicin (rimactane)		0.02
528.		111-20-6	Sebacic acid (1,8- octane dicarboxylic acid)	HOOC(CH2)8COOH	4
528.1	203-300-1	105-46-4	Sec-butyl acetate	C6H12O2	241	50	723	150
529.	231-978-9	7783-07-5	Hydrogen selenide	H2Se	0.07	0.02	0.17	0.05	-
530.	231-195-2	7446-09-5	Sulphur (IV) oxide (sulphur dioxide)	SO2	1.3	0.5	2.7	1
531.		7446-11-9	Sulphur (VI) oxide (sulphuric anhydride, sulphur trioxide)	SO3	1
532.		10025-67-9	Sulphur monochloride (disulphur dichloride)	S2Cl2	0.3
533.		75-15-0	Carbon disulphide	CS2	15	5			Skin; Auditory effect
534.		7704-34-9	Sulphur	S	6
535.		7664-93-9	Sulphuric acid3 (mist defined as the thoracic fraction)	H2SO4	0.05
536.		7783-06-4	Hydrogen sulphide	H2S	7	5	14	10
537.			Hydrogen sulphide mixed with hydrocarbons C1-C5		3
538.		7631-86-9	Silicon dioxide	SiO2	1
538.1			Inhalable crystalline silica dust		0.15
539.		409-21-2	Silicon carbide	SiC	6
540.		12033-89-5	Silicon nitride (trisilicon tetranitride)	Si3N4	6
541.		12007-81-7	Silicon tetracboride (tetraboron silicide)	SiB4	6
542.			Silicon and copper alloy		4
543.			Silicates and aluminosilicates:
			abrasive dust		2
			bauxite agglomerate		2
			mica, phlogopite, muscovite, talc, talc type dust		4
			artificial mineral fibres with silicate and aluminosilicate glassy structure (glass-fiber, glass-wool, slag and mineral wool etc.)		2
			mineral fibres, including rock wool, glass fibre		3 sol/cm3 air
			cement, apatite, clay		6
			glassy silicates of volcanic origin (tuff, pemza, perlite)		4
			zeolites (artificial and natural)		2
			pottery		2
			Ceramic fibres (fireproof)		0.3 sol/cm3 air
		16389-88-1	dolomite		6
544.		77348-01-7	Sylvinite	Cl2KNa	5
545.			Synthetic detergents		5
546.	205-634-3	144-62-7	Oxalic acid (ethanedioic acid)	HOOCCOOH	1	-	-	-	-
547.			Mixture of dialkyl diesters of oxalic acid (dialkyloxalates)		0.5
548.	200-579-1	64-18-6	Formic acid (methanoic acid)	HCOOH	9	5	-	-	-
549.	233-272-6	10102-44-0	Nitrogen dioxide	NO2	0.96	0.5	1.91	1
550.	233-271-0	10102-43-9	Nitrogen monoxide	NO	2.5	2	-	-
551.			Nitrogen oxides, (after NO2)		5
552.	231-714-2	7697-37-2	Nitric acid	HNO3	2	0.78	2.6	1
553.			Fiber glass in the basis of which there is polyester resin		5
554.		100-42-5	Styrene (vinylbenzene)	C6H5CH=CH2	10		30		Auditory effect
555.		57-92-1	Streptomycin (agrimycin, phytomycin)	C21H39N7O12	0.1
556.	231-131-3	7440-22-4	Silver metal	Ag	0.1	-	-	-	-
557.			Silver soluble compounds	After Ag	0.01	-
558.		57-68-1	Sulfadimidine (sulphamethazine, sulfodimesin, 4-amino-N-(4,6-dimethylpyrimidin-2-yl)-benzenesulfonamide)		1
559.		57-67-0	Sulfaguanidine (sulfanilylguanidine, sulgin, 4-amino-N-(aminoiminomethyl)-benzenesulfonamide)		1
560.		547-44-4	Sulfacarbamide	H2N-C6H4-SO2NHC(O)NH2	1
561.		152-47-6	Sulfalene (4-Amino-N-(3-methoxypyrazin- 2-yl)-benzenesulfonamide)		0.1
562.		651-06-9	Sulfametoxydiazine (5-methoxysulfadiazine, 4-amino-N-(5-methoxy-2-pyrimidinyl)-benzenesulfonamide)		0.1
563.		80-35-3	Sulphamethoxypyridazine (sulphanilic acid 6-methoxy-3-pyridazinyl amide, 4-amino-N-(6-methoxy-pyridazin-3-yl)-benzenesulfonamide)		0.1
564.		63-74-1	Sulfanilamide (streptocide, 4-aminobenzenesulfonamide)		1
565.		72-14-0	Sulfathiazol (4-amino-N-(thiazol-2-yl)-benzenesulfonamide, sulphanilic acid thiazol-2-ylamide, norsulfazole)		1
566.	222-995-2	3689-24-5	Sulfotep (tetraethyldithiopyrophosphate, 1,2-dithiodiphosphoric acid, tetraethyl ester)	C8H20O5P2S2	0.1	-	-	-	Skin
567.		107-92-6	Butyric acid (butanoic acid)	CH3(CH2)2COOH	10
568.		123-72-8	Butyraldehyde (butyraldehyde, butanal)	CH3(CH2)2CHO	5
569.		57218-73-2	Lead hydrocyanate		0.005
570.		15748-73-9	Lead disalicylate (2-hydroxybenzoato-lead salt)	(HOC6H4COO)2Pb	0.005
571.		7439-92-1	Lead and its inorganic compounds, (after lead)	Pb	0.05		0.1		Auditory effect
572.			Chamotte-graphite fireproof material		2
573.		1401-55-4	Tannin	C76H52O46	1
574.		13494-80-9	Tellurium	Te	0.01
575.		83-67-0	Theobromine (3,7-dimethylxanthine, 3,7-dihydro-3,7-dimethyl-1H-purine-2,6-dione)		1
576.		58-55-9	Theophylline (1,3-dimethylxanthine, 3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione)		0.5
577.	208-760-7	540-88-5	Tert-butyl acetate	C6H12O2	200
577.1		1634-04-4	Methyl tert-butyl ether	C5H12O	183.5	50	367	100
578.		9005-90-7	Essence of turpentine	C10H16	300
579.		60-54-8	Tetracycline	C22H24N2O8	0.1
579.1	201-083-8	78-10-4	Tetraethyl orthosilicate (ethyl silicate; tetraethoxysilane)	(C2H5O)4Si	44	5
580.		78-00-2	Tetraethyl lead	(C2H5)4Pb	0.005
581.		127-21-9	1,1,3,3-Tetrafluoro-1,3-dichloropropan-2-on (tetrafluoro-1,3-dichloroacetone)	ClF2CCOCF2Cl	2
582.		76-37-9	2,2,3,3-Tetrafluoropropan-1-ol	CHF2-CF2-CH2OH	20
583.	203-726-8	109-99-9	Tetrahydrofuran		150	50	300	100	Skin
584.		79-34-5	1,1,2,2-tetrachloroethane	CHCl2CHCl2	5
585.		25322-20-7	Tetrachloroethane (mixed isomers)	C2H2Cl4	5
586.	204-825-9	127-18-4	Tetrachloroethylene (perfluoroethylene)	C2Cl4	70	10	140	20	Skin
587.	200-262-8	56-23-5	Carbon tetrachloride (carbon tetracloride, tetrachlormethane)	CCl4	6.4	1	32	5	Skin
588.		1401-69-0	Tylosin		1
589.		68-11-01	Thioglycolic acid	HSCH2COOH	0.1
590.		62-56-6	Thiourea	NH2CSNH2	0.3
591.		12039-13-3	Titanium disulphide	TiS2	6
592.		25583-20-4	Titanium nitride	TiN	4
593.		12039-83-7	Titanium disilicide	TiSi2	4
594.		7440-32-6	Titanium	Ti	10
595.		13463-67-7	Titanium dioxide	TiO2	10
596.	202-429-0	95-53-4	o-toluidine	CH3C6H4NH2	0.5	0.1			Skin
597.		108-44-1	m-toluidine	CH3C6H4NH2	0.5		1
598.	203-403-1	106-49-0	P-toluidine (4-aminotoluene)	CH3C6H4NH2	4.46	1	8.92	2	Skin
599.		584-84-9	2,4-toluene diisocyanate (methyl-m-phenylene diisocyanate, toluene-2,4-diisocyanate, m-tolylidene diisocyanate)	C9H6N2O2	0.05
600.	203-625-9	108-88-3	Toluene (methylbenzol)	CH3C6H5	50	14	150	40	Skin; Auditory effect
601.		49721-45-1	4,5,6-Triaminopyrimidine sulphate (pyrimidine-4,5,6-triamino sulphate)		2
602.		559-11-5	2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoroheptyl acrylate (acrylic acid 1H, 1H- tridecafluoroheptyl ester, 2-propenoic acid 2,2,3,3,4,4,5,5,6,6,7,7,7-tridecafluoroheptyl ester)	H2C=CHCOOCH2(CF2)5CF3	30
603.	204-469-4	121-44-8	Triethylamine	(C2H5)3N	8.4	2	12.6	3	-
603.1	200-875-0	75-50-3	Trimethylamine	C3H9N	4.9	2	12.5	5
604.	204-428-0	120-82-1	1,2,4-trichlorobenzene		15, 1	2	37, 8	5	Skin
605.	200-756-3	71-55-6	1,1,1-trichloroethane (methyl chloroform)	CH3CCl3	555	100	1110	200
606.		461-18-7	4,4,4-Trifluoro-1-butanol	CF3(CH2)3OH	20
607.		507-52-8	1,1,1-trifluoro-2-methyl-propan-2-ol	(CH3)2C(OH)CF3	20
608.		75-89-8	2,2,2-trifluoroethanol	CF3CH2OH	10
609.		420-46-2	1,1,1-trifluoroethane (Freon 143)	CH3CF3	3000
610.		76-05-1	1,1,1-trifluoroacetic acid	CF3COOH	2
611.		25854-04-0	1,1,2-trichloro-1,3-butadiene	Cl2C=CCl-CH=CH2	3
612.		75-87-6	Trichloroacetaldehyde (chloral)	CCl3CHO	5
613.		76-03-9	Trichloroacetic acid	CCl3COOH	5
614.		76-02-8	Trichloroacetic acid chloroanhydride	CCl3COCl	0.1
615.	201-167-4	79-01-6	Trichloroethylene (trichloroethene)	ClCH=CCl2	54.7	10	164.1	20	Skin
616.		5329-12-4	2,4,6-trichlorophenylhydrazine		1
617.		96-18-4	1,2,3-trichloropropane	ClH2C-CHCl-CH2Cl	2
618.		3278-46-4	2,2,3-trichloropropanoic acid (chloropon)	ClCH2CCl2COOH	10
619.		96-19-5	1,2, 3-Trichloropropene	ClHC=CCl-CH2Cl	3
620.		10025-78-2	Trichlorsilan, after HCl	SiHCl3	1
621.		2077-46-5	2,3,6- trichlorotoluene		10
622.	208-394-8	526-73-8	1,2,3-trimethylbenzene		100	20	-	-	-
623.	202-436-9	95-63-6	1,2,4-trimethylbenzene (pseudocumol)		100	20	-	-	-
624.		118-96-7	2,4,6-trinitrotoluene (TNT)		0.1		0.5
625.		7440-61-1	Uranium, insoluble compounds	U	0.075
626.		7440-61-1	Uranium, soluble compounds	U	0.015
627.		57-13-6	Urea	NH2CONH2	10
628.			Urosulfane (sulfanilcarbamide)	H2N-C6H4-SO2NHC(O)NH2	1
629.		1314-34-7	Vanadium trioxide dust (disintegration aerosol) (divanadium trioxide dust (disintegration aerosol)	V2O3	0.5
630.		1314-62-1	Vanadium pentaoxide smoke (condensation aerosol) (divanadium pentaoxide smoke (condensation aerosol)	V2O5	0.1
631.		7440-62-2	Vanadium and its compounds (ferro-vanadium (after vanadium))	V	1
632.			Slag dust containing vanadium		4
633.		12019-57-7	Copper phosphide (tricopper phosphide)	Cu3P	0.5
634.		147-14-8	Copper-phthalocyanine		5
635.		17836-27-0	Copper chromium phosphate, after CrO3		0.02
636.		20936-31-6	Copper salicylate (salycilic acid copper salt)	Cu(C7H5O3)2 . 4H2O	0.1
637.		7758-89-6	Copper salt after copper (chloric acid, ch. acid, sulphuric acid etc.)	(Cu)	0.5
638.		25267-55-4	Copper trichlorophenolate	Cu(C6H2OCl3)2	0.1
639.		7440-50-8	Copper	Cu	0.5		1
640.		88-12-0	1`-Vinyl-2-pyrrolidone (N-Vinylpyrrolidone)		1
641.		108-05-4	Vinyl acetate (acetic acid, vinyl ester)	CH3COOCH=CH2	17.6	5	35.2	10
642.		689-97-4	Vinyl acetylene (1-butene-3-yne)	HCCCHCH2	20
643.			vinyl-phosphonicacid dichloro ethyl ester	CH2=CHP(O)(OCH2CH2Cl)2	0.6
644.	200-831-0	75-01-4	Vinyl chloride monomer (chloroethylene)	CH2=CHCl	2.6	1
645.			Polymers of vinyl chloride and vinylidene chloride		10
645.1	200-864-0	75-35-4	Vinylidene chloride (1,1-dichloroethylene)	C2H2Cl2	8	2	20	5
646.		100-69-6	2-vinylpyridine		0.5
647.		12070-12-1	Tungsten carbide	WC	6
648.		12039-88-2	Tungsten disilicide	WSi2	6
649.			Tungsten-cobalt alloy with diamond admixture up to 5 %		4
650.			Vulcanisation gases which arise in tyre manufacturing and in the production of other rubber articles		0.5
651.		81-81-2	Zoocoumarin (warfarin, 3-(α-acetonylbenzyl)-4-hydroxycoumarin, (R)-4-hydroxy-3-(3-oxo-1-phenyl-butyl)-2-benzopyrone, (S)-4-hydroxy-3-(3-oxo-1-phenyl-butyl)-2-benzopyrone)		0.001

Notes:

1 - EINECS - the substance number in the European Inventory of Existing Chemical substances;

2 - CAS - Chemical Abstract Service Number - the registration number of the substance in the reference publication Chemical Abstract;

3 -When selecting an appropriate exposure monitoring method, account should be taken of potential limitations and interferences that may arise in the presence of other sulphur compounds.

4 - Short-term exposure limit regarding the base time period of one minute.

5 - Inhalable fraction.

6 - Fraction which may enter into the respiratory tract.

7 - Inhalable fraction: If hardwood dust is mixed with other wood dust, the limit value shall apply to all types of dust present in that mixture.

8 - Inhalable fraction if biomonitoring approach is not implemented. Respirable fraction for cadmium by using biomonitoring approach with a biological exposure indicator not exceeding 2 µg Cd/g of creatinine in urine shall be in force until 11 July 2027.

Acting for the Minister for Welfare,
Minister for the Environment R. Vējonis

 

In Revised Version Submitted by the Ministry of Welfare

Annex 2
Cabinet Regulation No. 325
15 May 2007

Synonyms of Chemical Substances and Numbers Corresponding to Substances

[1 February 2011; 7 April 2015; 10 July 2018; 18 February 2021 / Paragraphs 59.¹, 236.¹, and 311.¹ of Annex and amendments to Annex regarding the deletion of Paragraphs 306 and 512 shall come into force on 20 May 2021. See Paragraph 58 of the Regulation]

No. of the synonym of the substance	Synonyms of chemical substances		No. of the substance in Annex 1
1.		abrasive dust	543
2.	3-	acetylanisole	443
3.	3-	acetylmethoxybenzene	443
4.	2-	acetoxybenzoic acid	3
5.	3-(α-	acetonylbenzyl)-4- hydroxycoumarin	651
6.		adipic acid dibutyl ester	165
7.		adobacillin	69
8.		agrimycin	555
9.		acrylaldehyde	17
10.		acryloilchloride	16
11.		acrylic acid 1H, 1H- tridecafluoroheptyl ester	602
12.		acrylic acid 2-ethoxyethyl ester	248
13.		acrylic acid ethyl ester	233
14.		acrylic acid, heptyl ester	305
15.		acrylic acid methyl ester	419
16.		acrofol	459
17.		alkanes	495
18.		alkyl amines	31
19.		aluminium oxide with silicon dioxide admixture	369
20.		amidopyrin	252
21.	1-	amino-propane-1,3-dicarboxylic acid	47
22.	4-	amino-1-methoxybenzene	73
23.	2-	amino-3-(4-imidazolyl) propanoic acid)	48
24.	2-	amino-3-(2-amino-2-carboxyethyldisulfanyl)propanoic acid)	44
25.	2-	amino-3-(3-imidazolyl) propanoic acid)	58
26.	2-	amino-3-(4-hydroxyphenyl) propanoic acid	56
27.	4-	amino-3, 5, 6- trichloropyridine-2-carboxylic acid	32
28.	2-	amino-3-phenyl-propanoic acid	45
29.	2-	amino-3-guanidinovaleric acid	41
30.	2-	amino-3-hydroxy-butanoic acid	57
31.	2-	amino-3-hydroxypropanoic acid	55
32.	2-	amino -3-mercaptopropionic acid	43
33.	2-	amino-3-methyl-butanoic acid	59
34.	2-	amino-3-methyl-pentanoic acid	49
35.	2 -	amino-4-methylmercaptobutyric acid	52
36.	2-	amino-4-methyl-pentanoic acid	50
37.		aminobenzylpenicillin	69
38.		aminobenzene	72
39.	4-	aminobenzenesulfonamide	564
40.	α -	amino- β -phenylpropionic acid	45
41.	α -	amino- β -mercaptopropionic acid	43
42.	α -	amino- β -.-methylvaleric acid	49
43.	2-	aminosuccinic acid	42
44.	2-	aminobenzoate	108
45.		aminoacetic acid	46
46.		aminophenylmethyl-penicillin	69
47.	α -	amino-g-methylthiobutyric acid	52
48.	α -	aminoisocaproic acid	50
49.	ε-	aminocaproic acid lactam	366
50.	4-	Amino-N-(3-methoxypyrazin-2-yl)-benzenesulfonamide)	565
51.	4-	amino-N-(4,6-dimethylpyrimidin- 2-yl)- benzenesulfonamide	558
52.	4-	amino-N-(5-methoxy-2-pyrimidinyl) benzenesulfonamide	562
53.	4-	amino-N-(5-ethyl-[1,3,4]thiadiazol-2-yl)-benzenesulfonamide	229
54.	4-	amino-N-(6-methoxy-pyridazin-3-yl)-benzenesulfonamide	563
55.	4-	amino-N-(aminoiminomethyl)-benzenesulfonamide	559
56.	4-	Amino-N-(thiazol-2-yl)-benzenesulfonamide	565
57.	2-	aminopropanoic acid	40
58.	3-	aminopropanoic acid	18
59.	α-	aminopropionic acid	40
59.1	4-	aminotoluene	598
60.		ammonium hydrofluoride	270
61.		ammonium hydrogen phosphate and dihydrogen phosphate mixture	60
62.		ammonium thiocyanate	64
63.		antihelmycin	310
63.1		p-anisidine	73
64.		apatite	543
65.		aziridine	241
66.		barium hydrogen phosphate	86
67.		barite	89
68.		benzal chloride	98
69.		benzyl cyanide	253
70.		benzo[def]chrysene	94
71.	p-	benzoquinone	102
72.	1.3-	benzenedicarboxylic acid	337
73.	1.2-	benzenedicarboxylic acid anhydride	281
74.	1.2-	benzenedicarboxylic acid, di-2-propenyl ester	161
75.	1.2-	benzenedicarboxylic acid, dialkyl esters	162
76.	1.2-	benzenedicarboxylic acid, dibutyl ester	167
77.	1.2-	benzenedicarboxylic acid, diethyl ester	173
78.	1.2-	benzenedicarboxylic acid, dimethyl ester	202
79.	1.4-	benzenedicarboxylic acid, dimethyl ester	206
80.	1.2-	benzenedicarboxylic acid, dinonyl ester	215
81.	1.2-	benzenedicarboxylic acid, diisobutylester	191
82.	1.3-	benzene-1,3-diol	525
83.		benzoic acid chloroanhydride	103
84.	2,2'-	bipyridine and 4,4'-bipyridine	113
85.		bis(2-ethylhexyl) sebacate	217
86.		bis-azepan-1-ylmethanone	221
87.		bisphenol A	341
88.		bis-N,N'-hexamethylene urea	221
89.		bauxite agglomerate	543
90.		boron trifluoride	117
91.	DL-	Bornan-2-one	365
92.	1-	Bromo-3-nitrobenzene	486
93.	1-	bromobutane	131
94.		bromoethane	236
95.		bromomethane	420
96.		butyraldehyde	568
97.		butanal	568
98.	1.4-	butanedicarboxylic acid	7
99.	1.4-	butane dicarbonic acid dibutyl ester	165
100.	1.4-	butanedicarboxylic acid monoethylester	8
101.	1-	butanol	137
102.	2-	butanol	137
103.	n-	butanol	137
104.		butanoic acid	567
104.1		butanedione	160.1
105.	3-	butene-2-one	438
106.	1-	butene-3-yne	642
107.		butyl cellosolve	139
108.		butyl glycol acetate	140
109.		butyl diglycol	141
109.1		1,4-butynediol	127.1
110.		cephalosporin N	142
111.		cephalosporin P	142
112.		cement	543
113.		cyanobenzene	106
114.	2-	cyanoethanol	309
115.		cyanoethylene	11
116.		cyanomethane	1
117.		hardwood	523
118.	p-	cymol	154
119.		zineb	155
120.		cis-3-Chloroacrylic acid sodium salt	459
121.		cis-3-Chloropropenoic acid, sodium salt	459
122.		DBP	167
123.	p,p'-	DDT (4,4'-DDT)	370
124.		decanedioic acid dibutyl ester	169
125.		decanedioic acid dimethyl ester	203
126.	1-	decanol	160
127.		demeton	407
128.		desflurane	71
129.		dialkyloxalates	547
129.1	4,4'-	diaminodiphenylmethane	427.1
130.	1.2-	diaminoethane	238
131.	1.6-	diaminohexane	298
132.	2,6-	diaminohexanoic acid	51
133.	α, ε -	diaminocaproic acid	51
134.		diammonium hydrogen orthophosphate	60
135.		diboron trizinc hexaoxide	157
136.		dibromomethane	427
137.		diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate	193
138.		diethylenediamine	504
139.		diethyl ((phenylthio)methyl)phosphonate)	307
140.	O,O'-	diethyl-O''-(2-ethylthioethyl) thiophosphate and O,O'-diethyl-S-(2-ethylthioethyl) thiophosphate mixture	407
141.		diphacinone	174
142.	2-	diphenylacetyl-1,3-Indandion	174
143.		diphenyl	112
144.		difluorochlorobromomethane	121
145.		diphosphorus pentasulphide	276
146.		diphosphorus pentaoxide	274
147.	3.7-	dihydro-1,3-dimethyl-1H-purine-2,6-dione	575
148.	3.7-	dihydro-3,7-dimethyl-1H-purine-2,6-dione	576
149.	1,3-	dihydroxybenzene	525
150.	2,2'	dihydroxydiethyl ether	171
151.	m-	dichlorobenzol	183
152.	o-	dichlorobenzol	182
153.	p-	dichlorobenzol	184
154.		dichloro-diphenyl-trichloroethane (DDT)	370
154.1		1,1-dichloroethylene	645
155.	1.2-	dichloro-1-fluoro-ethane	267
156.		dichloromethane	428
157.		dichloromethylbenzene	98
158.	α, α -	dichlorotoluene	98
159.		dichromates	334
160.		diludine	193
161.	N,N-	dimethyl-2-hydroxyethylamine	195
162.	2.2-	Dimethyl-3-(2-methyl-1-propenyl) cyclopropane-1-carboxylic acid)	382
163.	2.6-	dimethyl-3,5-diethoxycarbonyl-1,4-dihydropyridine	193
164.	2.3-	dimethylacrylic acid	415
165.	3.3-	dimethylacrylic acid ethyl ester	416
166.	α, α -	dimethylbenzylhydroperoxide	251
167.	1.2-	dimethylbenzene	386
168.	1.3-	dimethylbenzene	385
169.	1.4-	dimethylbenzene	387
170.		dimethylbenzene	384
170.1		dimethyl diketone	160.1
171.	N,N-	dimethylethanolamine	195
172.	N,N-	dimethylphenylamine	196
173.	1.3-	dimethylxanthine	576
174.	3.7-	dimethylxanthine	575
175.	O,O'-	dimethyl-O''-(2-ethylthioethyl) thiophosphate and dimethyl-S-(2-ethylthioethyl) thiophosphate mixture	433
176.	2.2-	dimethylvinylcarbinol	414
177.	2.4-	dinitrochlorobenzene	314
178.	4.6-	dinitro-o-cresol	426
179.	2,2'-	dipyridyl and 4,4'-dipyridyl	113
180.		dipropylene glycol monomethyl ether	441
181.		disulphur dichloride	532
182.	[10 July 2018]
183.	3,3'-	dithiobis-2-aminopropanoic acid	44
184.	1.2-	dithiodiphosphoric acid, tetraethyl ester	566
185.		divanadium pentaoxide smoke	630
186.		divanadium trioxide dust	629
187.		DNOC	426
188.		dodecan-1-ol	220
189.		dolomite	543
190.		DPM	441
191.		yellow prussiate of potash	358
192.		iron agglomerate	223
193.		baking soda	461
194.		electro-corundum	22
195.		enflurane	71
196.	1.2-	epoxypropane	518
197.	2-	propenoic acid 2-ethoxyethyl ester	248
198.		ethanal	2
199.	N,N'-	ethanediylbis-dithiocarbamic acid zinc salt	155
200.	1.2-	ethanediol	239
201.		ethanedioic acid	546
202.		ethanol	246
203.		acetic acid 3-methylbutyl ester	335
204.		acetic acid, benzyl ester	96
205.		acetic acid, methyl ester	418
206.		acetic acid, propyl ester	513
207.		acetic acid, vinyl ester	641
208.		ethyl -[[3-[2-(diethylamino)ethyl]-4-methyl-2-oxo-2H-1-benzopyran-7-yl]oxy]acetate hydrochloride	368
209.		crotonic acid, 3-methyl-, ethyl ester	416
210.		ethyl acetate	232
211.		ethylbutylcetone	304
211.1		ethylene dichloride	186
212.	1.2-	ethylendicarbonic acid anhydride	400
213.		ethylene glycol dimethyl ether	207
214.		ethyleneglycol monobutyl ether acetate	140
215.		ethyleneglycol monobutyl ether	139
216.		ethylene glycol monoethyl ether	237
216.1		2-ethyl-1-hexanol	243.1
217.	2-	ethylhexyl acrylate	14
217.1		2-ethylhexyl alcohol	243.1
218.		ethylsoamykeltone	423
219.		ethyl mercaptan	228
220.		ethylmethylketone	126
221.	O-	ethyl O-phenyl S-propyl phosphorothioate	307
221.1		ethyl silicate	579.1
222.	2-	ethoxyethanol	237
223.		phenibute	33
224.	[(2-	phenyl-1,5-dimethyl-3-oxo-2.3-dihydro-1H-pyrazol-4-yl)-methyl-amino] methan esulfonate	70
225.	6-	phenylacetamido penicillinic acid sodium salt	99
226.		phenylamine	72
227.	2-	phenylazomalononitrile	254
228.	N,N'-(m-	phenylene) disuccinimide	258
229.	1,1-(1,3-	phenylene)bis(1H-pyrrole-2,5-dione)	258
230.	1.2-	phenylenediamine	256
231.	1.3-	phenylenediamine	255
232.	1.4-	phenylenediamine	257
232.1		Phenylene ether	175.1
233.		phenylhydrazonomalononitrile	254
234.		phenylcarbinol	100
235.		phenylmethanol	100
236.		phenyl methyl ketone	4
236.1	2-	phenylpropane	388
237.	2-	phenylpropene	436
238.		phenmedipham	111
238.1		Phenoxybenzene	175.1
239.	3-	phenoxyphenol	262
240.		ferro-vanadium	631
241.		phytomycin	555
242.		phlogopite	543
243.		formaldehyde dimethylacetal	208
244.	2-	formylfuran	288
245.		phosphorus pentachloride	273
246.		phosphorus pentaoxide	274
247.		phosphoryl trichloride	275
248.		phosphoric acid, dibutyl phenyl ester	166
249.		freon 11	268
250.		freon 12	177
251.		freon 12 Br	121
252.		freon 13 B1	124
253.		freon 141	267
254.		freon 142	179
255.		freon 143	609
256.		freon 152	178
257.		freon -112	176
258.	2-	furancarboxaldehyde	288
259.		germanium (IV) oxide	292
260.		germane	293
261.		glutamic acid 5-lactam	53
262.		glutaric acid dialdehyde	294
263.		grain dust	523
263.1		gypsum dust	353.1
264.		halotan	71
265.		hexachloropropanone	295
266.	1.6-	hexanediamine	298
267.	1.6-	hexamethylene diisocyanate	299
268.		hexanedioic acid dibutyl ester	165
269.		hexanoic acid	367
270.		heptanol	306
271.		herban	289
271.1		hydrogenated diphenylbenzenes	308.1
272.	2-	hydroxy-2-methylpropionitrile	5
273.	(R)-4-	hydroxy-3-(3-oxo-1-phenyl-butyl))-2-benzopyrone	651
274.	(S)-4-	hydroxy-3-(3-oxo-1-phenyl-butyl))-2-benzopyrone	651
275.	7-[2-	hydroxy-3-(N-(2-hydroxyethyl), -N-methylamino] propyl) theophylline nicotinate	383
276.		hydroxybenzene	264
277.	2-	hydroxybenzoato-lead salt	570
278.	2-	hydroxyethyl acrylate	15
279.	3-(4-	hydroxyphenyl)alanine	56
280.	α-	hydroxyisobutyronitrile	5
281.	2-	hydroxymethylfuran	287
282.	1-	hydroxynaphthalene	456
283.	2-	hydroxynaphthalene	457
284.	3-	chloro-1,2-epoxypropane	226
284.1	1-	chloro-2,3-epoxypropane	226
285.	1-	chloro-3-hydroxypropane	312
286.		chloroacetyl chloride	447
287.		chloral	612
288.		picloram	32
289.	1-	chlorobutane	133
290.		chloroethane	244
291.		chloroacetic acid	446
292.		chloroethylene	644
293.		chloromethane	429
294.		chloropon	618
295.		chloropelargonic acid	319
296.	α -	chloropropionic acid	322
297.	α -	chlorotoluene	97
298.		homopiperidine	300
299.		chromium orthophosphate	328
300.		chromium trioxide	329
301.		chromium-ammonium alum	333
302.		intencordin	368
303.		Iintensain	368
304.		slag and mineral wool	543
305.		isoamyl methyl ketone	422
306.	[18 February 2021. See Paragraph 58 of Amendments]
307.		isobutyl acetone	422
308.		isobutyl methyl ketone	424
309.		iso-butyl alcohol	137
310.		isoflurane	71
311.	[7 April 2015]
311.1		isopentyl alcohol	336
312.		isopentyl acetate	335
313.		isopentyl methyl ketone	422
314.		isopropylbenzene	250
315.		isopropyl acetate	424
316.		isopropylbenzene hydroperoxide	251
317.		isopropylbenzene	388
318.		isopropyl alcohol	340
319.	2-	isopropyltoluene	154
320.	3-	isopropyltoluene	154
321.	4-	isopropyltoluene	154
322.		calcium dihydroxide	348
323.		dipotassium hexafluorosilicate	357
324.		potassium O- alkyldithiocarbonate	354
325.		Carbonic acid, dithio-, O-butyl ester	355
326.		Potassium O-ethyl dithiocarbonate	356
327.		carbamonitrile	148
328.		carbathione	466
329.		carbinol	413
330.		carboxide (pesticide)	221
331.	1-	carboxymethyl pyridinium betaine	111
332.		carbonyl dichloride	280
333.		caustic soda	462
334.		pottery	543
335.		cresol mixture	381
336.		trisodium hexafluoroaluminate	270
337.	2.6-	xylenol	200
338.	o-,m-,p-	xylene	384
339.		cumyl hydroperoxide	251
340.		cumene hydroperoxide	251
341.		cumolhydroperoxide	198
342.		cuprozan	155
343.		white spirit	393
344.		lauryl alcohol	220
345.		luminophores P - 385	84
346.		magnesium dodecaboride	398
347.		maleinanhydride	400
348.		clay	543
349.		maneb	404
350.		methacrylic anhydride	410
351.		methacrylic chloride	411
352.		methanal	271
353.		methanoic acid	548
354.	2-	metyl-1,3-butadiene	339
355.	3-	metyl-1-butanol	336
356.	1-	methyl-1-ethanol	340
357.	2-	Methyl-propan-1-ol	137
358.	3-	methyl-2-butanol	431
359.		methyl 2-methylpropenoate	434
360.	N-	Methyl2-pyrrolidone	425
361.	2-	Methyl-propan-2-ol	137
362.		methyl-amyl-ketone	303
363.		methylal	208
364.		methylbenzol	600
365.	3-	methyl-1-butyl acetate	335
366.	1-	methylbutyl ethanoate	421
366.1		demeton-methyl	433
367.		methyldithiocarbamate	466
368.		methyldithiocarbamic acid, sodium salt	466
369.		methylethylketone	126
370.	o-, m-, p-	methylphenols	381
371.		methyl chloroform	605
372.		methylisobutylketone	424
373.	2-	Crotonic acid, 2-methyl-	415
374.		methyl mercaptan	412
375.	4-	methyl-m-phenylene diisocyanate	599
376.		methyloxirane	518
377.		methyl pentyl ketone	303
378.	4-	methylpiperazine-1amine	34
379.	3-(1-	Methyl-2-pyrrolidinyl) pyridine	474
380.		methyl propenoate	419
381.	2-	methylpropionic acid	409
382.	2-	methylpropenoic acid anhydride	410
383.	2-	methylpropionic acid amide	408
384.	2-	propenoic acid, 2-methyl-, butyl ester	135
385.	2-	methylpropenoic acid chloroanhydride	411
386.	2-	methyl-2-propenoic acid methyl este	433
387.		methyl alcohol	413
388.	α-	methylstyrene	250
389.	N-	Methylurea	437
390.	1-	methoxy-4-nitrobenzene	484
391.	4-	methoxyaniline	73
392.	5-	methoxysulfadiazine	562
393.		monoethanolamine	35
394.		monochlorbenzene	317
395.		monopropylene glycol methyl ether	442
396.		muscovite	543
397.		petroleum	393
398.	2-	naphthenic acid	453
399.	α -	naphthol	456
400.	β	naphthol	457
401.		sodium 3-chloroacrylate	459
402.		soda lye	462
403.		sodium thiocyanate	470
404.		n-butyl acetate	231
405.		inorganic chromium (II) compounds	327
406.		inorganic chromium (III) compounds	327
407.		nicotinamide	476
408.	N-(5-	Nitro-2-furfurylidene)-1-aminohydantoin	284
409.	m-	nitroaniline	482
410.	o-	nitroaniline	481
411.	p-	nitroaniline	483
412.		nitrofural	282
413.		nitrofurantoin	283
414.	3-(5-	nitrofurfurylidenamino)-2-oxazolidinone	286
415.	5-	nitrofuranyl semicarbazone	282
416.	N-[2-(5'-	nitrofuryl-2)-2-propenylidine]-1-amino-hydantoin	284
417.	N-[(5'-	nitro-2'-furyl)acrylidene]-1-aminohydantoin	284
417.1		nitroglycerin	293.1
418.		nivalin	289
419.		nonanol	491
420.		norsulfazole	565
421.		nururon	289
422.		carbon disulphide	533
423.		carbon monoxide	493
424.		carbon tetrafluoride	587
425.	2,2'	oxybisethanol	171
426.		oxirane	242
427.	2,2,3,3,4,4,5,5	octafluoropenthyl acrylate	13
428.		octan-1,8-dicarboxilic acid dioctyl ester	217
429.	1.8-	octane dicarboxylic acid	528
430.	1.8-	octane-1,8-dicarboxylic acid dimethyl ester	203
431.		octanol	497
432.		orthoboric acid barium salt	83
433.		orthophosphoric acid	278
434.		pemza	543
435.		3-Penten-3-ol	414
436.		pentacarbonyliron	222
437.	1.5-	pentanedial	294
438.	1-	pentanol	30
439.		pentanoic acid	79
440.	3-	pentyl acetate	26
441.		pentyl acetate	25
442.		pentyl bromide	28
443.	3-	pentyl ethanoate	26
444.		pentyl ethanoate	25
445.		pentyl formate	29
446.		perhydroazepine	300
447.		perchloroethylene	586
448.		perlite	543
449.		petroleum ether	392
450.		polyethylene	510
451.		piramidon	252
452.		pyrethrum	506
453.	1-	pyridylacetic acid betaine	111
454.		pyridine-3-carboxylic acid	475
455.		pyridine-3-carboxylic acid amide	476
456.		pyrimidine-4,5,6-triamino sulphate	601
457.		pyrrolidone-5-carboxylic acid	53
458.	2-	pyrrolidone carboxylic acid	54
459.		polyamide	510
460.		polyethylene terephtalate	389
461.		polyformaldehyde	510
462.		polycaprolactam	510
463.		polypropylene	510
464.		polysaccharide	390
465.		polyurethane	510
466.		Portland cement	144
467.		propanal	522
468.	1.2-	Propanediol cyclic carbonate	515
469.	1.2-	propanediol	517
470.	1-	propanol	521
471.	2-	propanol	342
472.	2-	propanone	6
473.	2-	propanol, dimethyl ketone	6
474.		propionic acid propyl ester	520
475.	2-	propene-1-ol	19
476.	2-	prop-2-enal	17
477.		propenoyl chloride	16
478.		propene	519
479.		propenoic acid	12
480.	2-	propenoic acid 2,2,3,3,4,4,5,5,6,6,7,7,7-tridecafluoroheptyl ester	602
481.	2-	propenoic acid 2,2,3,3,4,4,5,5-octafluoropenthyl ester	13
482.	2-	propenoic acid 2-ethylhexyl ester	14
483.		propenoic acid 2-hydroxyethyl ester	240
484.		propenoic acid amide	10
485.	2-	propenoic acid ethyl ester	233
486.		propenoic acid, heptyl ester	305
487.		propenoic acid, methyl ester	419
488.	n-	propylamine	514
489.		propylbenzene	388
490.		propylene glycol monomethyl ether acetate	441
491.		propylene glycol monomethyl ether	442
492.		propylene chlorohydrin	315
493.	2-	propyn-1-ol	511
494.		propionic acid	512
495.		pseudocumol	623
496.		dust of plant and animal origin	523
497.		dust, sugar	523
498.		dust, wood	523
499.		cotton, linen, wool, piles, and peat dust	523
500.		dust, flour	523
500.1		carbon, coal, diamond dust	494
501.		dust, paper	523
501.1		polymeric materials (polyethylene, polypropylene etc.) dust	510
501.2		silicate and aluminosilicate dust	543
502.		dust, tobacco	523
503.		dust of talc type	523
504.		tea dust	523
505.		ratindan	174
506.		rimactane	527
507.		salycilic acid cupric salt	636
508.		red prussiate of potash	359
509.		sebacic acid dibutyl ester	169
510.		sebacic acid, dimethyl ester	203
511.		sebacic acid dioctyl ester	217
512.	[18 February 2021 / See Paragraph 58 of the Regulation]
513.		sulphur dioxide	530
514.		sulphur trioxide	531
515.		sulphuric anhydride	531
516.		sevoflurane	71
516.1		formic acid methyl ester	421.1
517.		formic acid pentyl ester	29
518.		glass fibre	543
519.		glass wool	543
520.		streptocide	564
521.		sulfodimesin	558
522.		sulfaethylthiadiazole	229
523.		sulfaethidiole	229
524.		sulphamethazine	558
525.		sulfanilylguanidine	559
526.		sulphanilic acid 6-methoxy-3-pyridazinyl amide	563
527.		sulphanilic acid thiazol-2-ylamide	565
528.		sulfanilcarbamide	637
529.		sulgin	559
530.		talc	543
531.		theophylline + 1,2 ethylenediamine	225
532.		tert-butanol	137
533.		tert-pentyl acetate	27
534.		tert-Pentyl hydroperoxide	417
535.		terylene	389
535.1		tetraethoxysilane	579.1
536.		tetraboron silicide	541
537.		tetraethyldithiopyrophosphate	566
538.		tetrafluoro-1,3-dichloroacetone	581
539.		tetrachlorodifluoroethane	176
540.		tetracarbonyl nickel	479
541.		tillam	245
542.		TNT	624
543.	m-	tolylene diisocyanate	599
544.		toluene-2,3- diamine	163
545.		toluene-2,4-diisocyanate	599
546.		tordon-22k	32
547.		triacylglycerol	394
547.1		1,2,4-triazol-3-amine	30.1
548.		trizinc diphosphide	156
549.		trifluorobromomethane	124
550.	1,1,1-	bis-(4-chlorophenyl)-2,2,2,-trichloroethane	370
551.		trichloroethene	615
552.		trichloromethane	320
553.		tricarbonyl (methylcyclopentadienyl) manganese	403
554.		trimellitic acid	105
555.	1,3,5-	trimethylbenzene	445
556.	1,7,7-	trimethylbicyclo(2,2,1)heptan-2-one	365
557.		trimethylene chlorohydrin	312
558.	1,3,7-	trimetylxanthine	375
559.	2,4,6-	trinitrophenol	503
560.		trisilicon tetranitride	540
561.		tricopper phosphide	633
562.		tuff	543
562.1		carbon monoxide gas	493
563.		white spirit	393
564.		warfarin	651
565.		vinylbenzene	554
566.		vinylbenzene	435
567.	N-	vinylpyrrolidone	640
568.		vinyltoluene	435
569.		vitamin B2	526
570.		mica	543
571.		hydrocyanic acid	149

Acting for the Minister for Welfare,
Minister for the Environment R. Vējonis

 

In Revised Version Submitted by the Ministry of Welfare

Annex 3
Cabinet Regulation No. 325
15 May 2007

Biological Limit Values

[18 February 2021 / The new wording of Annex shall come into force on 11 July 2021. See Paragraph 59 of the Regulation]

1. The BLV of lead (Pb):

1.1. in blood is 30 µg Pb/100 ml (reference value - lead concentration in blood of population not subject to occupational exposure ≤ 10 µg/100 ml). A repeat blood test shall be carried out in two months if the lead level is 30-60 µg/100 ml. If the lead level is > 60 µg/100 ml, transfer to work where there is no contact with lead, health care and a repeat control of Pb level are required;

1.2. clinical blood picture, reticulocytes and punctate graininess of basophils in erythrocytes;

1.3. coproporphyrin in urine -100 µg/g of creatinine (reference value 22-57 µg/g of creatinine);

1.4. aminolevulinic acid in urine - 5 mg/g of creatinine (reference value 0.5-2.5 mg/g of creatinine).

2. The BLV of mercury (Hg):

2.1. in blood is 10 µg Hg/L (reference value for the mercury concentration in blood of population not subject to occupational exposure < 1 µg/L);

2.2. in urine is 30 µg Hg/g creatinine (reference value for the mercury concentration in urine is < 5 µg Hg/g creatinine or 3.5 µg/L).

3. The BLV of cadmium (Cd) in urine is 2 µg Cd/g creatinine (the time of taking samples does not affect the results of analyses).

4. The BLV of chromium (Cr) in urine is 10 µg Cr/g creatinine when changing during a shift, the urine samples are taken at the end of the shift or working week (reference value of the total chromium concentration in blood of population not subject to occupational exposure < 0.8 µg/L, in urine - < 0.01 µmol/L).

5. Metabolites and the following chemical substances shall be determined to organic solvents (benzene, toluene, styrene):

5.1. to benzene - phenylmercapturic acid (BLV 46 µg/g creatinine) shall be determined in urine at the end of the shift or exposure, benzene (BLV 28 µg/L) shall be determined in blood immediately after the end of the shift;

5.2. to toluene - hippuric acid shall be determined in urine (BLV 1.6 g/g creatinine) at the end of the shift, in blood - toluene (BLV 0.05 mg/L);

5.3. to styrene - mandelic acid shall be determined in urine (BLV 0.8 g/g creatinine) at the end of the shift, in blood - styrene (BLV 0.55 mg/L).

6. The activity of cholinesterase in erythrocytes shall be determined to phosphorus organic compounds, BLV 70 % of the base level.

7. The BLV for aniline in urine is 0.2 mg aniline/L (after hydrolysis, the urine samples have been taken at the end of the shift).

8. The BLV for cumene (2-phenylpropane) in urine is 7 µg 2-phenyl-2-propanol/g creatinine, the urine samples have been taken within two hours after the end of the shift.

9. The BLV for nickel and its inorganic compounds in urine is 3 µg Ni/L.

 

In Revised Version Submitted by the Ministry of Welfare

Annex 4
Cabinet Regulation No. 325
15 May 2007

Determination of Concentration of a Chemical Substance in the Air of the Working Environment

1. Samples shall be taken in the more characteristic workplaces. Performing the same work operation with similar tools, the air of the working environment shall be controlled by the sampling principle of workplaces, choosing them both in the centre of the room and at the sides of the room.

2. The air for analysis shall be taken during the working process (in typical work conditions) in the zone of breathing of the employee - in the hemisphere of the part of the room within 0.3 m radius, which embraces the face of a human with a centre in the middle between the eyes and the centre of which is situated on the line which goes through the middle of the head and larynx.

3. During the shift or during a separate stage of the technological process at one workplace (point) at least three samples shall be taken for the assessment of exposure; in determining aerosols of fibrogenic effect, one sample is permissible.

4. Calibrated accurate instrumental analytical measuring equipment shall be used for sampling and analysis.

5. If the gas and vapour concentration (C_g) is expressed in measurement units independent from temperature and air pressure ppm, then taking into account the molar weight of the substance [vielas molmasa] and the capacity taken by the mol of the gaseous substance at the relevant temperature, the concentration of the mass of the gaseous chemical substance (C, mg/m³) shall be calculated in accordance with the following formulae:

C(mg / m3) =	molar weight of the substance	x Cg(ppm), at 20°C
	24.04

 

C(mg / m3) =	molar weight of the substance	x Cg(ppm), at 25°C
	24.44

6. Expressing the concentration of the mass of the gaseous chemical substance (C, mg/m³) as the gas and vapour concentration (C_g) in measurement units independent from temperature and air pressure ppm, the following recalculation formulae shall be used:

Cg(ppm) =	24.04	x C(mg / m3), at 20°C
	molar weight of the substance

 

Cg(ppm) =	24.44	x C(mg / m3), at 25°C
	molar weight of the substance

7. The concentration of the chemical substance for the shift shall be determined in the following way:

7.1. one or several consecutive air samples shall be taken during the eight hour working day or during a shift (the amount of air of the working environment, which is taken for analysis in order to measure the concentration of dangerous substances in the air sample taken), in which the necessary analyses are performed;

7.2. sampling shall be performed using individual air receivers (devices which receive air at the respiration area of the employee), during the shift or the average indicator is determined after the results of analysis taken separately during the shift;

7.3. in determining the average indicator by the results of analysis taken separately during the shift, it shall be calculated as the average for a time period, when the employee performs all the operations of the technological process; and

7.4. the calculations of the concentration shall be performed in accordance with the following formula:

Cmaiņā =	∑ Ci ti	=	C1 t1 + C2 t2 + ········Cn tn	, where:
	∑ ti		8

C_maiņā - indicates the average arithmetical concentration of the chemical substance during the shift, mg/m³;

C_i, C₁,C₂ …C_n- the concentration of the dangerous chemical substance in time periods of separate stages of the technological process (operations) , mg/m³ during the shift;

t_i, t₁ , t₂, t_n - the duration of separate stages (operations) of the technological process - the corresponding exposure time, expressed in hours

∑t_i - the duration of the whole shift in hours, for example, 8 hours;

7.5. the assessment of the working environment shall cover at least 75 % of the duration of a shift and it shall be performed during several work shifts.

8. Specification of the concentration of the chemical substance in the samples obtained during the performance of measurements shall be carried out in accordance with the method used in a certain case and the measurement instrument and the results obtained shall be compared with OEV.

9. In determining the concentration of dangerous chemical substances:

9.1. the methodology and measurement instruments for specification of chemical substances shall ensure specific substance specification even if other substances are present in the working environment at least at 0.1 OEV level (for specification of the approximate concentration 0.5 OEV level is permissible);

9.2. the total error of the concentration of the chemical substance may not exceed ± 25 %;

9.3. the result of the measurement of the chemical substance concentration shall be applied to circumstances where the air temperature is 20 ⁰C (293 K) and ambient pressure 760 mm Hg (101,23 kPa).

10. Specification of the approximate concentration of chemical substances with indication tubes and other indicative measurement instruments shall be performed in accordance with the information provided by the manufacturer, including operating instructions, taking into account the presence of other substances in the air of the working environment at the same time and the possible effect thereof on the results of measurements;

11. Quick operation gas analysers shall be used for continuous automated control of dangerous substances of quick exposure in the working environment.

12. If the result below the detection limit of the method (the minimum concentration of the chemical substance, which may be detected using this method) is obtained during measurements, it shall be considered that the concentration of the chemical substance to be determined is a half of the concentration of such chemical substance, which is specified as a detection limit of a particular method.

Acting for the Minister for Welfare,
Minister for the Environment R. Vējonis

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Translation © 2021 Valsts valodas centrs (State Language Centre)