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  • Occupational exposure limits

1972

CIS 73-530 Criteria for a recommended standard: Occupational exposure to carbon monoxide
Recommendations are made for the control of occupational exposure to carbon monoxide. The time-weighted average exposure (8h) should not exceed 35ppm, and the ceiling concentration 200ppm. Other requirements relate to medical supervision, labelling, personal protection, emergency procedures, information of employees, work practices and monitoring. The criteria upon which the recommendations are based are discussed at some length under the following headings: biological effects of exposure; environmental data; development of he standard; compatibility with air quality standards. Procedures for the sampling of CO in air and the analysis of carboxyhaemoglobin and additional useful information are given in appendices.
National Institute for Occuaptional Safety and Health, 5600 Fischers Lane, Rockville, MD 20852, USA, 1972. 132p. Illus. 129 ref.

CIS 73-1341 Bingham E.
Responses of alveolar macrophages - I. Inhalation of lead and nickel
Rats were subjected for one or several weeks to the inhalation of soluble and insoluble aerosols of lead and nickel (PbCl2, Pb2O3, NiCl2, NiO) at concentrations near or below the occupational TLVs. The number of alveolar macrophages was significantly increased after exposure to NiO, significantly decreased with Pb2O3 and not significantly altered with PbCl2 and NiCl2. The histopathological examination (light microscopy) of the lungs revealed changes after the inhalation of both nickel compounds. The experimental results suggest that the level of the current TLV for nickel (1000µg/m3) should be re-evaluated, as it may be too high.
Archives of Environmental Health, Dec. 1972, Vol.25, No.6, p.406-414. Illus. 13 ref.

CIS 73-886 Egorov J.L.
Maximum allowable concentrations of a series of aliphatic alcohols in the workplace atmosphere
Predel'no dopustimye koncentracii rjada alifatičeskih spirtov v vozduhe rabočej zony [en ruso]
Description of animal experiments to determine the toxic action of fatty alcohols on the central nervous system, by the use of new methods (electroretinography, determination of retinocortical time with electroretinogram and electroencephalogram recordings). On the basis of the results obtained - which are presented in graph form - the authors propose a MAC of 5mg/m3 for methyl alcohol and of 10mg/m3 for propyl, butyl and amyl alcohol.
Gigiena i sanitarija, Sep. 1972, Vol.50, No.9, p.17-22. Illus. 18 ref.

CIS 73-858 Rjazanova R.A., Družinina V.A., Nevstrueva V.V.
Proposed threshold limit values (TLV) of zineb in air based on animal experiments
Ėksperimental'nye materialy k obosnovanija predel'no dopustimoj koncentracii cineba v vozduhe rabočih pomeščenij [en ruso]
Description, with comments, of animal experiments carried out to ascertain the toxic effects of inhaled zineb. The functional disturbances observed in various body systems as a result of breathing zineb concentrations of 200, 20 and even 5mg/m3 is shown in a table. Research was also carried out on the embryo of rats. In view of the gonadotoxic and embryotoxic effects of zineb, an atmospheric TLV of 0.5mg/m3 is recommended for this compound.
Gigiena i sanitarija, Aug. 1972, Vol.50, No.8, p.42-45. 3 ref.

1971

CIS 89-1808 Sulfuric acid
Kwas siarkowy [en polonés]
Chemical safety information sheet. Permissible exposure limit (Poland) = 0.1mg/m3.
Centralny Instytut Ochrony Pracy, 1 Ul. Tamka, 00-349 Warszawa 30, Poland, 1971. 2p.

CIS 89-1805 Sodium hydroxide
Wodorotlenek sodowy [en polonés]
Chemical safety information sheet. Permissible exposure limit (Poland) = 0.5mg/m3.
Centralny Instytut Ochrony Pracy, 1 Ul. Tamka, 00-349 Warszawa 30, Poland, 1971. 2p.

CIS 89-1799 Pyridine
Pirydyna [en polonés]
Chemical safety information sheet. Permissible exposure limit (Poland) = 5mg/m3.
Centralny Instytut Ochrony Pracy, 1 Ul. Tamka, 00-349 Warszawa 30, Poland, 1971. 2p.

CIS 89-1791 Hydrogen sulfide
Siarkowodór [en polonés]
Chemical safety information sheet. Permissible exposure limit (Poland) = 10mg/m3.
Centralny Instytut Ochrony Pracy, 1 Ul. Tamka, 00-349 Warszawa 30, Poland, 1971. 2p.

CIS 89-1772 Ammonia
Ammoniak [en polonés]
Chemical safety information sheet. Permissible exposure limit (Poland) = 20mg/m3.
Centralny Instytut Ochrony Pracy, 1 Ul. Tamka, 00-349 Warszawa 30, Poland, 1971. 2p.

CIS 89-1771 Acetylene
Acetylen [en polonés]
Chemical safety information sheet. Permissible exposure limit (Poland) = 500mg/m3.
Centralny Instytut Ochrony Pracy, 1 Ul. Tamka, 00-349 Warszawa 30, Poland, 1971. 2p.

CIS 72-2722
Committee on Toxicology, National Academy of Sciences
Guides for short-term exposure of the public to air pollutants - II. Guide for hydrogen chloride
On the basis of a review of the documentation available as regards single or intermittent brief exposures to hydrogen chloride, the Committee has established a series of exposure limits applicable to short-term public exposures (from 10 to 60min and over) and to public emergency exposures (10 to 60min). The analytical methods available for the determination of HCl in air are briefly discussed.
National Research Council, Washington D.C. 20418, USA, Aug. 1971. 10p. 31 ref.

CIS 72-2526 Acceptable concentrations of acetone
This standard, sponsored by the American Industrial Hygiene Association, is introduced by a statement on the meaning of acceptable concentrations. It briefly gives the properties of acetone and its hazards to health. Maximum acceptable concentrations are given as follows: 1000ppm for the time-weighted average exposure during an 8-hour work day, with a corresponding ceiling concentration of 3000ppm; and 6000ppm for a duration of not more than 30min once in an 8-hour work day. Recommendations are made as regards air sampling procedures and analytical determination of acetone in air.
American National Standards Institute, 1430 Broadway, New York, N.Y. 10018, USA, 1971. 8p. 10 ref.

1970

CIS 89-1796 Nitrobenzene
Nitrobenzen [en polonés]
Chemical safety information sheet. Permissible exposure limit (Poland) = 2mg/m3.
Centralny Instytut Ochrony Pracy, 1 Ul. Tamka, 00-349 Warszawa 30, Poland, 1970. 2p.

CIS 89-1785 Ethyl ether
Eter etylowy [en polonés]
Chemical safety information sheet. Permissible exposure limit (Poland) = 300mg/m3.
Centralny Instytut Ochrony Pracy, 1 Ul. Tamka, 00-349 Warszawa 30, Poland, 1970. 2p.

CIS 72-2718 MacEwen J.D., Theodore J., Vernot E.H.
SysteMed Corporation
Human exposure to EEL concentrations of monomethylhydrazine
Human volunteers were exposed for 10min to a concentration of 90ppm of MMH corresponding to the tentative emergency exposure limit (EEL) of this compound. Comparative tests were conducted with ammonia in order to assess irritating effects and odour intensity on a subjective basis. The results of biochemical and pulmonary function tests are also given. The tentative EEL for MMH includes an adequate safety factor and does not produce bronchospasms or severe lachrymation.
National Technical Information Service, Springfield, Virginia 22151, USA, Dec. 1970. 9p. Illus.

1961

CIS 07-1176 Límites aceptables de ruido industrial
Annehmbare Lärmschwellen in der Industrie [en alemán]
Limites acceptables des bruits industriels [en francés]
Maximum acceptable levels for industrial noise [en inglés]
Esta nota informativa compara los niveles sonoros admisibles en Francia y otros países. Presenta, asimismo, la curva de ruido límite aceptable preconizada por la Comisión Técnica del Ruido francesa (marzo, 1961)
International Occupational Safety and Health Information Centre (CIS), International Labour Office, 1211 Genève 22, Switzerland, Dec. 1961. 4p. Illus. 1 ref.

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