Molecular Formula: AsNa₃O₄
Molar mass: 207.89 g/mol
EINECS: 231-547-5
Water solubility: Soluble in water forming weakly acidic solutions
Appearance: Colorless to white crystalline solid
Product categories of Arsenic acid, trisodium salt (CAS NO.7631-89-2): Inorganics
Structure of Arsenic acid, trisodium salt (CAS NO.7631-89-2):
            
Systematic Name: Trisodium arsorate
SMILES: [Na+].[Na+].[Na+].[O-][As]([O-])([O-])=O 
InChI: InChI=1/AsH3O4.3Na/c2-1(3,4)5;;;/h(H3,2,3,4,5);;;/q;3*+1/p-3 
InChIKey: CDBAKLRDFBGJOX-DFZHHIFOAK 
Std. InChI: InChI=1S/AsH3O4.3Na/c2-1(3,4)5;;;/h(H3,2,3,4,5);;;/q;3*+1/p-3 
Std. InChIKey: CDBAKLRDFBGJOX-UHFFFAOYSA-K

IARC Cancer Review: Human Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 (1980),p. 39.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Inadequate Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 2 (1973),p. 48.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 (1980),p. 39.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Reported in EPA TSCA Inventory. Arsenic and its compounds are on the Community Right-To-Know List. EPA Extremely Hazardous Substances List.

Confirmed human carcinogen with experimental tumorigenic data. Poison by ingestion, intravenous, and intraperitoneal routes. An experimental teratogen. Other experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of As and Na₂O. See also ARSENIC COMPOUNDS.

OSHA PEL: TWA 0.01 mg(As)/m³; 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: CL 2 µg(As)/m³/15 M
DOT Classification:  6.1; Label: Poison

 Arsenic acid, trisodium salt ,its cas register number is 7631-89-2.It also can be called Arsenic(V) acid, trisodium salt, heptahydrate (1:3:7) ; Sodium arsenate ; Monosodium arsenate and Arsenate, sodium .The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions.When heated to decomposition, Arsenic acid, trisodium salt (CAS NO.7631-89-2) emits toxic fumes of arsenic.