| Volatilization | The Henry's Law constant for 2,3-pentanedione is estimated as 3.95X10-5 atm-cu m/mole(SRC) derived from its vapor pressure, 20 mm Hg(1), and water solubility, 6.67X10+4 mg/L(2). This Henry's Law constant indicates that 2,3-pentanedione 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 16 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). 2,3-Pentanedione's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of 2,3-pentanedione from dry soil surfaces may exist based upon its vapor pressure(1).
Literature: (1) US Occupational Safety & Health Administration; Chemical Sampling Information. 2,3-Pentanedione. Available from, as of June 9, 2016 https://www.osha.gov/dts/chemicalsampling/data/CH_260240.html (2) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of June 9, 2016: http://www2.epa.gov/tsca-screening-tools (3) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) |
| Soil Adsorption | Using a structure estimation method based on molecular connectivity indices(1), the Koc of 2,3-pentanedione can be estimated to be 1(SRC). According to a classification scheme(2), this estimated Koc value suggests that 2,3-pentanedione is expected to have very high mobility in soil.
Literature: (1) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of June 9, 2016: http://www2.epa.gov/tsca-screening-tools (2) Swann RL et al; Res Rev 85: 17-28 (1983) |
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