Lewisite
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Lewisite
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CAS No:
541-25-3
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Formula:
C2H2AsCl3
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Chemical Name:
Lewisite
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Synonyms:
Arsonous dichloride,As-(2-chloroethenyl)-;Arsine,dichloro(2-chlorovinyl)-;Arsonous dichloride,(2-chloroethenyl)-;Lewisite;As-(2-Chloroethenyl)arsonous dichloride;Chlorovinylarsine dichloride;2-Chlorovinyldichloroarsine;Dichloro(2-chlorovinyl)arsine;Lewisite (arsenic compound);Lewisite I;Dichloro(β-chlorovinyl)arsine;Lewisite 1
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CAS No:
Description
Colorless liquid when pure; geraniumlike odor. Impurities lead to colors ranging from violet to brown, decomposed by water and alkalies. Inactivated by bleaching powder. Antidote is dimercaptopropanol.
Characteristics
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When pure, a colorless oily liquid solidifying at -13°C. Impurities cause colors ranging from brown to violet. Faint odor of geranium. Irritating to the eyes and mucous membranes at concentrations below the threshold of odor. Very toxic; used as a war gas. Produces severe vesication (blistering) even through rubber (Merck); absorbed through the skin to produce seven systemic effects. Antidote: dimercaprol (British Anti-Lewisite). Prolonged exposure of container to fire or intense heat may result in violent rupturing and rocketing of container.
1.888 g/cm3 @ Temp: 20 °C
0.1 °C
196.6 °C
None (EPA, 1998)
In water, 500 mg/L, temp not reported
Store in tightly closed containers in a cool, well vented area away from alkalis.
0.58 mm Hg at 25 deg C
7.1 (Air=1)
LD50 in rats (mg/kg): 50 orally; in rats, rabbits (mg/kg): 24, 6 dermally; 1, 2 s.c. (Goldman, Dacre)
Faint odor of geranium