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Registry of Toxic Effects of Chemical Substances (RTECS)

Methane, dibromodifluoro-

RTECS #

PA7525000

CAS #

75-61-6

Updated

September 201

Molecular Weight

209.83

Molecular Formula

CBr2F2

Synonyms

Difluorodibromomethane
Difluorodibromomethane (ACGIH:OSHA)
Freon 12-B2
Halon 1202

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
inhalation/mouse lethal concentration (50 percent kill): 140 gm/m3/2HBehavioral: Rigidity (includes catalepsy)

Liver: Other changes

Kidney, Ureter, and Bladder: Other changes		TLSMA6 111,10,1975
inhalation/mouse lethal concentration (50 percent kill): 259200 mg/m3/2HVCVGH* -,623,1990
inhalation/rat lethal concentration (50 percent kill): 210600 mg/m3/4HVCVGH* -,623,1990
inhalation/rat Lowest published lethal concentration: 470000 mg/m3/15MVCVGH* -,623,1990

Reviews

OrganizationStandardReference
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-time-weighted average 100 ppmDTLVS* TLV/BEI,2013

Standards and Regulations

OrganizationStandardReference
Mine Safety and Health Administration (MSHA) STANDARD-airtime-weighted average 100 ppm (860 mg/m3)DTLVS* 3,86,1971
Occupational Exposure Limit IN ARGENTINA, BULGARIA, COLOMBIA, JORDAN check ACGIH TLV;
Occupational Exposure Limit IN SINGAPORE, VIETNAM check ACGIH TLV
Occupational Exposure Limit-AUSTRALIAtime-weighted average 100 ppm (858 mg/m3), JUL2008
Occupational Exposure Limit-AUSTRIAMAK-TMW 100 ppm (860 mg/m3);KZW 400 ppm (3440 mg/m3), 2007
Occupational Exposure Limit-BELGIUMtime-weighted average 100 ppm (870 mg/m3), MAR2002
Occupational Exposure Limit-DENMARKtime-weighted average 100 ppm (860 mg/m3), MAY2011
Occupational Exposure Limit-FINLANDtime-weighted average 100 ppm (870 mg/m3), short term exposure limit 150 ppm (1300 mg/m3), NOV2011
Occupational Exposure Limit-FRANCEVME 100 ppm (860 mg/m3), FEB2006
Occupational Exposure Limit-ICELANDtime-weighted average 100 ppm (860 mg/m3), NOV2011
Occupational Exposure Limit-KOREAtime-weighted average 100 ppm (860 mg/m3), 2006
Occupational Exposure Limit-MEXICOtime-weighted average 100 ppm (860 mg/m3);short term exposure limit 150 ppm (1290 mg/m3), 2004
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 100 ppm (858 mg/m3), JAN2002
Occupational Exposure Limit-PERUtime-weighted average 100 ppm (858 mg/m3), JUL2005
Occupational Exposure Limit-SWITZERLANDMAK-week 100 ppm (860 mg/m3), KZG-week 200 ppm (1720 mg/m3), JAN2011
Occupational Exposure Limit-THE NETHERLANDSMAC-TGG 860 mg/m3, 2003
Occupational Exposure Limit-THE PHILIPPINEStime-weighted average 100 ppm (860 mg/m3), JAN1993
Occupational Exposure Limit-TURKEYtime-weighted average 100 ppm (860 mg/m3), JAN1993
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Construction)8H time-weighted average 100 ppm (860 mg/m3)CFRGBR 29,1926.55,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Federal Contractors)8H time-weighted average 100 ppm (860 mg/m3)CFRGBR 41,50-204.50,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (General Industry)8H time-weighted average 100 ppm (860 mg/m3)CFRGBR 29,1910.1000,1994
Occupational Safety and Health Administration (OSHA) Permissible Exposure Limit (Shipyards)8H time-weighted average 100 ppm (860 mg/m3)CFRGBR 29,1915.1000,1993

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO DIFLUORODIBROMOMETHANE-air10H time-weighted average 100 ppmNIOSH* DHHS #92-100,1992
National Occupational Exposure Survey 1983Hazard Code 25515; Number of Industries 1; Total Number of Facilities 7; Number of Occupations 1; Total Number of Employees Exposed 28
National Occupational Hazard Survey 1974Hazard Code 25515; Number of Industries 2; Total Number of Facilities 40; Number of Occupations 3; Total Number of Employees Exposed 2234

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
NIOSH Analytical Method, 1994: Difluorodibromomethane, 1012

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