Potassium Arsenite
Title: Potassium Arsenite
CAS Registry Number: 13464-35-2
Literature References: Commercial material prepd as variable composition; approx KH(AsO2)2.H2O. Toxicity data: A. J. Lehman, Q. Bull. Assoc. Food Drug Off. U.S. 15, 122 (1951). Evaluation of carcinogenic risk: IARC Monographs 2, 48-73 (1973); Comm. Eur. Communities, Toxicol. Chem. 3, 53-58 (1991).
Properties: White, hygroscopic powder; gradually dec on exposure to air (by the CO2). Very poisonous! Sol in water. Keep well closed. LD50 orally in rats: 14 mg/kg (Lehman).
Toxicity data: LD50 orally in rats: 14 mg/kg (Lehman)
 
Derivative Type: Potassium arsenite solution
CAS Registry Number: 1332-10-1
Additional Names: Fowler's solution; arsenical solution
Literature References: Prepd by dissolving arsenic trioxide in aq potassium bicarbonate and ethanol. Toxicity study: H. Tinwell et al., Environ. Health Perspect. 95, 205 (1991).
 
Use: In manuf of mirrors to reduce the silver salt to metallic silver.
Therap-Cat: Fowler's soln formerly as antineoplastic, dermatologic.
Therap-Cat-Vet: Fowler's soln has been used as an alterative or tonic, in pulmonary emphysema, chronic coughs, anemias, chronic skin diseases.

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