Lewisite
Compounds
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Lewisite is an organoarsenic compound. It was once manufactured in the U.S., Japan, Germany and the Soviet Union for use as a chemical weapon, acting as a vesicant and lung irritant. Wikipedia
Formula: C2H2AsCl3
Molar mass: 207.32 g/mol
Melting point: 32.18°F (0.1°C)
Boiling point: 374°F (190°C)
Density: 1.89 g/cm3
Solubility: Ethers, hydrocarbons, THF
Vapor pressure: 0.58 mmHg (25 °C)