| Volatilization | The Henry's Law constant for ethyl n-butyrate is estimated as 4.4X10-4 atm-cu m/mole(SRC) derived from its vapor pressure, 14.0 mm Hg(1), and water solubility, 4,900 mg/L(2). This Henry's Law constant indicates that ethyl n-butyrate 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 5 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 5 days(SRC). Ethyl n-butyrate's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of ethyl n-butyrate from dry soil surfaces may exist(SRC) based upon its vapor pressure(1).
Literature: (1) Daubert TE, Danner RP; Physical and Thermodynamic Properties of Pure Compounds Am Inst Chem Eng (1995) (2) Riddick JA et al; Organic Solvents New York, NY: John Wiley & Sons Inc. (1984) (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 ethyl n-butyrate can be estimated to be 20(SRC). According to a classification scheme(2), this estimated Koc value suggests that ethyl n-butyrate 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 May 13, 2015: http://www.epa.gov/oppt/exposure/pubs/episuitedl.htm (2) Swann RL et al; Res Rev 85: 17-28 (1983) |
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