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Registry of Toxic Effects of Chemical Substances (RTECS)

Arsenic acid, diammonium salt

RTECS #

CG0850000

CAS #

7784-44-3

Updated

September 201

Molecular Weight

176.03

Molecular Formula

AsHO4·2H4N

Synonyms

Ammonium acid arsenate
Diammonium arsenate
Diammonium hydrogen arsenate
Diammonium monohydrogen arsenate
Dibasic ammonium arsenate
Secondary ammonium arsenate

Reviews

OrganizationStandardReference
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-time-weighted average 0.01 mg(As)/m3DTLVS* TLV/BEI,2013
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-Confirmed human carcinogenDTLVS* TLV/BEI,2013

Standards and Regulations

OrganizationStandardReference
Mine Safety and Health Administration (MSHA) STANDARD-airtime-weighted average 0.5 mg(As)/m3DTLVS* 3,16,1971
Occupational Exposure Limit-BELGIUMtime-weighted average 0.1 mg(As)/m3, Carcinogen, MAR2002
Occupational Exposure Limit-DENMARKtime-weighted average 0.01 mg(As)/m3, carc, MAY2011
Occupational Exposure Limit-KOREAtime-weighted average 0.2 mg(As)/m3, 2006
Occupational Exposure Limit-MEXICOtime-weighted average 0.2 mg(As)/m3, 2004
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 0.05 mg(As)/m3, carcinogen, JAN2002
Occupational Exposure Limit-SWEDENtime-weighted average 0.01 mg(As)/m3, Carcinogen, JUN2005
Occupational Exposure Limit-SWITZERLANDMAK-week 0.1 mg(As)/m3, carc 1, inhal, JAN2011
Occupational Exposure Limit-UNITED KINGDOMtime-weighted average 0.1 mg(As)/m3, carc, OCT2007
Occupational Safety and Health Administration (OSHA)-cancer hazardCFRGBR 29,1910.1018,1987

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO ARSENIC, INORGANIC-airCarcinogen ceiling concentration 0.002 mg(As)/m3/15MNIOSH* DHHS #92-100,1992

Status in Federal Agencies

OrganizationReference
NIOSH CURRENT INTELLIGENCE BULLETIN 14, 1976
NTP 10th Report on Carcinogens,2002:Known to be a human carcinogen
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