Emergency and Continuous Exposure Limits for Selected Airborne Contaminants Volume 1 (1984) / Chapter Skim
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Methane
Methane
Pages 95-98
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From page 95... ...
, however, offered evidence that methane has mild anesthetic properties that cannot be explained by oxygen deficiency alone, although such deficiency does seem to be the most important factor. Two of six mice exposed to 70% methane in air died in 18 min.
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From page 96... ...
COMMITTEE RECOMMENDATIONS EXPOSURE LIMITS In 1966, the Committee on Toxicology set an EEL and a CEL for methane: 24-h EEL: 5,000 ppm 90-d CEL: 5,000 ppm No rationale accompanied these limits. It is obvious that an exposure limit that presents an explosion hazard cannot be recommended, even if it is well below a concentration that would produce toxicity; thus, exposure limits should not exceed 5: by volume in air.
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From page 97... ...
1982. Threshold Limit Values for Chemical Substances and Physical Agents in the Work Environment with Intended Changes for 1982.
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From page 98... ...
COMMITTEE RECOMMENDATIONS EXPOSURE LIMITS In 1966, the Committee on Toxicology set an EEL and a CEL for methane: 24-h EEL: 5,000 ppm 90-d CEL: 5,000 ppm No rationale accompanied these limits. It is obvious that an exposure limit that presents an explosion hazard cannot be recommended, even if it is well below a concentration that would produce toxicity; thus, exposure limits should not exceed 5: by volume in air.
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