Chloropicrin

CAS RN: 76-06-2

Volatilization

The Henry's Law constant for chloropicrin is 2.05X10-3 atm-cu m/mole(1). This Henry's Law constant indicates that chloropicrin is expected to volatilize from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 4 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 5 days(SRC). Chloropicrin's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). Chloropicrin is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 24 mm Hg(3). Volatilization of chloropicrin following application to Arlington sandy loam soil columns (0.92% organic matter, pH 7.2) was 82% within 15 days(4).
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