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Registry of Toxic Effects of Chemical Substances (RTECS)

Mercury(II) oxide

RTECS #

OW8750000

CAS #

21908-53-2; 1344-45-2; 8028-34-0

Updated

September 201

Molecular Weight

216.59

Molecular Formula

HgO

Synonyms

C.I. 77760
Mercuric oxide
Mercuric oxide, red
Mercuric Oxide, Yellow
Mercury monoxide
Mercury(2+) oxide
Oxyde de mercure (French)
Red mercuric oxide
Red oxide of mercury
Santar
Yellow mercuric oxide
Yellow precipitate

Reproductive Effects Data and References

Route/OrganismDoseEffectReference
oral/rat 10800 µg/kg (5D pregnant)Reproductive: Effects on embryo or fetus: Fetotoxicity (except death, e.g., stunted fetus)

Reproductive: Specific developmental abnormalities: Eye, ear
PWPSA8 15,52,1972
oral/rat 10800 µg/kg (19D pregnant)Reproductive: Effects on fertility: Post- implantation mortality (e.g., dead and/or resorbed implants per total number of implants)PWPSA8 15,52,1972
oral/mouse 34 mg/kg (10D pregnant)Reproductive: Effects on embryo or fetus: Fetal deathAPTOD9 19,A126,1980
oral/mouse 225 mg/kg (4-12D pregnant)Reproductive: Other developmental abnormalitiesTJADAB 26(1),46A,1982

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
intramuscular/rat lowest published lethal dose: 22 mg/kgNCIUS* PH43-64-886
intraperitoneal/mouse lethal dose (50 percent kill): 4500 µg/kgGTPZAB 25(7),27,1981
oral/mouse lethal dose (50 percent kill): 16 mg/kgGTPZAB 25(7),27,1981
oral/rat lethal dose (50 percent kill): 18 mg/kgNTIS** PB214-270
skin/rat lethal dose (50 percent kill): 315 mg/kgGTPZAB 25(7),27,1981

Reviews

OrganizationStandardReference
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-time-weighted average 0.025 mg(Hg)/m3 (skin)DTLVS* TLV/BEI,2013
American Conference of Governmental Industrial Hygienists (ACGIH)Threshold Limit Value-Not classifiable as a human carcinogenDTLVS* TLV/BEI,2013
International Agency for Research on Cancer (IARC)Cancer Review:Human Inadequate EvidenceIMEMDT 58,239,1993
International Agency for Research on Cancer (IARC)Cancer Review:Group 3IMEMDT 58,239,1993
TOXICOLOGY REVIEWSDGTB3 1,177,1971

Standards and Regulations

OrganizationStandardReference
Mine Safety and Health Administration (MSHA) STANDARD-airtime-weighted average 0.05 mg(Hg)/m3DTLWS* 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-AUSTRALIAtime-weighted average 0.003 ppm (0.025 mg(Hg)/m3), JUL2008
Occupational Exposure Limit-BELGIUMtime-weighted average 0.025 mg(Hg)/m3, Skin, MAR2002
Occupational Exposure Limit-FINLANDtime-weighted average 0.02 mg(Hg)/m3, skin, NOV2011
Occupational Exposure Limit-FRANCEVME 0.1 mg(Hg)/m3, Skin, FEB2006
Occupational Exposure Limit-GERMANYMAK 0.02 mg(Hg)/m3, skin, sen, 2011
Occupational Exposure Limit-HUNGARYtime-weighted average 0.08 mg(Hg)/m3, short term exposure limit 0.32 mg(Hg)/m3, Skin, SEP2000
Occupational Exposure Limit-KOREAtime-weighted average 0.1 mg(Hg)/m3, skin, 2006
Occupational Exposure Limit-NEW ZEALANDtime-weighted average 0.025 mg(Hg)/m3, JAN2002
Occupational Exposure Limit-NORWAYtime-weighted average 0.05 mg(Hg)/m3, JAN1999
Occupational Exposure Limit-POLANDMAC(time-weighted average) 0.05 mg(Hg)/m3, MAC(short term exposure limit) 0.15 mg(Hg)/m3, JAN1999
Occupational Exposure Limit-RUSSIAtime-weighted average 0.05 mg(Hg)/m3, short term exposure limit 0.2 mg(Hg)/m3, Skin, JUN2003
Occupational Exposure Limit-SWEDENtime-weighted average 0.03 mg(Hg)/m3, Skin, JUN2005
Occupational Exposure Limit-SWITZERLANDMAK-week 0.02 mg(Hg)/m3, KZG-week 0.16 mg(Hg)/m3, inhal, skin, sen, JAN2011
Occupational Exposure Limit-THAILANDshort term exposure limit 0.05 mg(Hg)/m3, JAN1993
Occupational Exposure Limit-THE PHILIPPINEStime-weighted average 0.05 mg(Hg)/m3, JAN1993

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Level TO MERCURY, ARYL AND INORGANIC-airceiling concentration 0.1 mg/m3 (Sk)NIOSH* DHHS #92-100,1992
National Occupational Exposure Survey 1983Hazard Code 80143; Number of Industries 10; Total Number of Facilities 506; Number of Occupations 27; Total Number of Employees Exposed 9517; Total Number of Female Employees Exposed 3800
National Occupational Hazard Survey 1974Hazard Code 80143; Number of Industries 9; Total Number of Facilities 654; Number of Occupations 10; Total Number of Employees Exposed 3859

Status in Federal Agencies

OrganizationReference
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JANUARY 2001
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