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7784-44-3

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Basic Information
CAS No.: 7784-44-3
Name: AMMONIUM ARSENATE
Article Data: 19
Molecular Structure:
Molecular Structure of 7784-44-3 (AMMONIUM ARSENATE)
Formula: AsH3 O4 . 2 H3 N
Molecular Weight: 158.974
Synonyms: Ammoniumarsenate ((NH4)2AsHO4) (6CI,7CI); Ammonium acid arsenate; Ammonium arsenate((NH4)2HAsO4); Diammonium arsenate; Diammonium hydrogen arsenate; Diammoniummonohydrogen arsenate; Dibasic ammonium arsenate; Secondary ammonium arsenate
EINECS: 232-067-9
Density: 1.989
Melting Point: decomposes [CRC10]
Solubility: soluble H2O, decomposed by hot H2O [HAW93]
Appearance: white to off-white powder
Hazard Symbols: Xi
Safety: Confirmed human carcinogen. A poison. When heated to decomposition it emits very toxic fumes of As, NOx, and NH3. See also ARSENIC.
PSA: 86.25000
LogP: 0.27260
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Chemistry

Empirical Formula: H9AsN2O4
Molecular Weight: 176.0041 
EINECS: 232-067-9
Appearance: A white crystalline solid
Solubility: Water soluble; decomposes in hot water
Structure of Diammonium hydrogen arsenate (CAS NO.7784-44-3):
                   
IUPAC Name of Diammonium hydrogen arsenate (CAS NO.7784-44-3): Diazanium hydrogen arsorate
Canonical SMILES: [NH4+].[NH4+].O[As](=O)([O-])[O-]
InChI: InChI=1S/AsH3O4.2H3N/c2-1(3,4)5;;/h(H3,2,3,4,5);2*1H3
InChIKey: XPVHUBFHKQQSDA-UHFFFAOYSA-N

Consensus Reports

Arsenic and its compounds are on the Community Right-To-Know List.

Safety Profile

Confirmed human carcinogen. A poison. When heated to decomposition it emits very toxic fumes of As, NOx, and NH3. See also ARSENIC.

Standards and Recommendations

OSHA PEL: OSHA: Cancer Hazard
ACGIH TLV: TWA 0.01 mg/m3; Confirmed Human Carcinogen; BEI: 35 µ (As)/L inorganic arsenic and methylated metabolites in urine
NIOSH REL: (Inorganic Arsenic) CL 0.002 mg(As)/m3/15M
DOT Classification:  6.1; Label: Poison

Specification

 Diammonium hydrogen arsenate ,its cas register number is 7784-44-3. It also can be called Dibasic ammonium arsenate ; Ammonium acid arsenate ; Diammonium monohydrogen arsenate ; and Arsenic acid, diammonium salt .Solutions of Diammonium hydrogen arsenate (CAS NO.7784-44-3) are acidic. They neutralize bases in reactions that generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acids.