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Registry of Toxic Effects of Chemical Substances (RTECS)

Methane

RTECS #

PA1490000

CAS #

74-82-8

Updated

July 2013

Molecular Weight

16.05

Molecular Formula

CH4

Synonyms

Fire Damp
Marsh gas
Methane (ACGIH:OSHA)
Methyl hydride

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
inhalation/mouse lethal concentration (50 percent kill): 326 gm/m3/2HTPKVAL 9,7,1967
inhalation/mouse lethal concentration (50 percent kill): 500000 ppm/2HTPKVAL 9,7,1967

Reviews

OrganizationStandardReference
TOXICOLOGY REVIEWMUREAV 539,77,2003
TOXICOLOGY REVIEWENTOX* -,53,2005
TOXICOLOGY REVIEWNCLNA* 16,503,1998

Standards and Regulations

OrganizationStandardReference
Mine Safety and Health Administration (MSHA) STANDARDASPHYXIANTS/GASESDTLWS* 3,22,1973
Occupational Exposure Limit IN ARGENTINA, BULGARIA, COLOMBIA, JORDAN check ACGIH TLV;
Occupational Exposure Limit IN SINGAPORE, VIETNAM check ACGIH TLV
Occupational Exposure Limit-AUSTRALIAAsphyxiant, JUL2008
Occupational Exposure Limit-BELGIUMtime-weighted average 1000 ppm ( mg/m3), MAR2002
Occupational Exposure Limit-FINLANDtime-weighted average 1000 ppm, NOV2011
Occupational Exposure Limit-MEXICOSimple asphyxiant, 2004
Occupational Exposure Limit-NEW ZEALANDSimple asphyxiant, JAN2002
Occupational Exposure Limit-RUSSIAshort term exposure limit 7000 mg/m3, JUN2003
Occupational Exposure Limit-SWITZERLANDMAK-week 10000 ppm (6700 mg/m3), JAN2011
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction)simple asphyxiant-inert gases and vaporsCFRGBR 29,1926.55,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)Simple asphyxiant - inert gas and vaporCFRGBR 29,1915.1000,1993

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Occupational Exposure Survey 1983Hazard Code 45655; Number of Industries 30; Total Number of Facilities 3141; Number of Occupations 41; Total Number of Employees Exposed 65649; Total Number of Female Employees Exposed 2728
National Occupational Hazard Survey 1974Hazard Code 45655; Number of Industries 28; Total Number of Facilities 729; Number of Occupations 41; Total Number of Employees Exposed 12323

Status in Federal Agencies

OrganizationReference
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA Section 8(d) unpublished health/safety studies
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JANUARY 2001
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