Lewisite

CAS RN: 541-25-3

Soil Adsorption / Mobility

The Koc of Lewisite is estimated as 143(SRC), using a water solubility of 500 mg/L(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that Lewisite is expected to have high mobility in soil. Heavily splashed liquid Lewisite will persist up to a day under temperate conditions(4). Vapor hydrolyzation will take place in hot, humid climates, thus greatly reducing persistence(4). Lewisite persists for long durations in snow(4).
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