Mesityl Oxide

CAS RN:141-79-7

Volatilization

The Henry's Law constant for mesityl oxide is estimated as 3.67X10-5 atm-cu m/mole(SRC) derived from its vapor pressure, 8.21 mm Hg(1), and water solubility, 28,900 mg/L(2). This Henry's Law constant indicates that mesityl oxide is expected to volatilize from water surfaces(3). 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)(3) is estimated as 17 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)(3) is estimated as 11 days(SRC). Mesityl oxide's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of mesityl oxide from dry soil surfaces may exist(SRC) based upon its vapor pressure(1).
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