The Henry's Law constant for 2-hexanone is estimated as 9.3X10-5 atm-cu m/mole(SRC) derived from its vapor pressure, 11.6 mm Hg(1), and water solubility, 17,200 mg/L(2). This Henry's Law constant indicates that 2-hexanone 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 7 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 7 days(SRC). 2-Hexanone's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of 2-hexanone from dry soil surfaces may exist(SRC) based upon a vapor pressure of 11.6 mm Hg(1).
Literature: (1) Riddick JA et al; Organic Solvents: Physical Properties and Methods of Purification 4th ed NY,NY: Wiley Interscience (1986) (2) Yalkowsky SH, He Y; Handbook of Aqueous Solubility Data. CRC Press LLC, Boca Raton, FL. p. 301 (2003) (3) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990)
The Koc of 2-hexanone is estimated as 134(SRC), using a log Kow of 1.38(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that 2-hexanone is expected to have high mobility in soil.
Literature: (1) Hansch C et al; Exploring QSAR Hydrophobic, Electronic and Stearic Constants Washington,DC: Amer Chem Soc p. 24 (1995) (2) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 4-9 (1990) (3) Swann RL et al; Res Rev 85: 23 (1983)