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7784-37-4

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Basic Information
CAS No.: 7784-37-4
Name: MERCURIC ARSENATE
Molecular Structure:
Molecular Structure of 7784-37-4 (MERCURIC ARSENATE)
Formula: AsHO4•Hg
Molecular Weight: 340.52
Synonyms: Mercuric arsenate;Mercury(II) o-arsenate;UN1623;Mercuric arsenate [UN1623] [Poison];EINECS 232-062-1;Arsenic acid (H3AsO4),mercury(2+) salt (1:1);Mercury hydrogenarsenate;
Solubility: insoluble H2O; soluble HCl, HNO3 [MER06]
Hazard Symbols: Toxic by ingestion, inhalation, and skin absorption; strong irritant. TLV: TWA 0.1 mg(Hg)/m3.
Safety: Confirmed human carcinogen. A poison. When heated to decomposition it emits very toxic fumes of Hg and As. See also MERCURY and ARSENIC COMPOUNDS.
PSA: 83.42000
LogP: -1.29670
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    Mercuric arsenate

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Chemistry

The IUPAC name of Mercuric arsenate (CAS NO.7784-37-4): arsoric acid; mercury
Synonyms: Mercuric arsenate ; Mercury(Ⅱ)arsenate ; Mercuric (II)arsenate ; Mercury(ii)o-arsenate ; Mercuryhydrogenarsenate ; Mercury(II) hydrogen arsenate ; Arsenic acid mercury(I) salt
CAS: 7784-37-4
EINECS: 232-062-1
Molecular Formula: AsHHgO4
Formula Weight: 340.52 g/mol
Molecular Structure:

General Description: A yellow powder. Insoluble in water. Soluble in hydrochloric acid. Toxic by ingestion, skin absorption and inhalation. A strong irritant. Used to make waterproof paints.
Air & Water: Reactions Insoluble in water.
 

Toxicity Data With Reference

The toxicity of Mercuric arsenate (CAS NO.7784-37-4):
ACGIH TLV-TWA 0.025 mg(Hg)/m3 (skin) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 ACGIH TLV-TWA 0.01 mg(As)/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 ACGIH TLV-Not classifiable as a human carcinogen DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997

Consensus Reports

Mercury and its compounds, as well as arsenic and its compounds, are on the Community Right-To-Know List.

Safety Profile

The Health Hazard of Mercuric arsenate (CAS NO.7784-37-4):
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways.
Confirmed human carcinogen. A poison. When heated to decomposition it emits very toxic fumes of Hg and As. See also MERCURY and ARSENIC COMPOUNDS.

Standards and Recommendations

OSHA PEL: 0.01 mg(As)/m3; Cancer Hazard; CL 0.1 mg(Hg)/m3 (skin)
ACGIH TLV: TWA 0.01 mg/m3; Confirmed Human Carcinogen; BEI: 35 µ (As)/L inorganic arsenic and methylated metabolites in urine; BEI: 35 µg/g creatinine total inorganic mercury in urine preshift; 15 µg/g creatinine total inorganic mercury in blood at end of shift at end of workweek.
NIOSH REL: (Arsenic, Inorganic) CL 0.002 mg(As)/m3/15M; (Mercury, Aryl and Inorganic) CL 0.1 mg/m3 (skin)
DOT Classification:  6.1; Label: Poison