Nitromethane

CAS RN:75-52-5

Volatilization

The Henry's Law constant for nitromethane is 2.86X10-5 atm-cu m/mole(1). This Henry's Law constant indicates that nitromethane 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 27 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 10 days(SRC). Nitromethane's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). Nitromethane is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 35.8 mm Hg at 25 deg C(3).
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