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Lewisite (mineral) (1306-02-1)

Identification
Properties
Melting Point: 0.1 deg C
Boiling Point: 190 deg C at 760 mm Hg (decomposes); 93 deg C at 26 mm Hg; 76-77 deg C at 12.5 mm Hg
Solubility:Greater than 10% in ethyl ether; greater than 10% in ethanol
Sol in ordinary organic solvents; insol in dilute mineral acids
In water, 500 mg/L, temp not reported [Goldman M, Dacre JC; Rev Environ Contam Toxicol 110: 75-115 (1989)] PubMed Abstract
Color: Colorless liquid when pure; impurities lead to colors ranging from violet to brown.
Freshly distilled lewisite is colorless but becomes darker with time, becoming violet-black or green. [Goldman M, Dacre JC; Rev Environ Contam Toxicol 110: 75-113 (1989)] PubMed Abstract
Purified lewisite is a colorless oily liquid; synthesized lewisite is an amber-to-dark brown liquid.
Safety Data