The Henry's Law constant for n-nonane is estimated as 3.4 atm-cu m/mole(SRC) derived from its vapor pressure, 4.45 mm Hg(1), and water solubility, 22 mg/L)(2). This Henry's Law constant indicates that n-nonane is expected to volatilize rapidly 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 3.3 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 4.5 days(SRC). However, volatilization from water surfaces is expected to be attenuated by adsorption to suspended solids and sediment in the water column. The estimated volatilization half-life from a model pond is 155 days if adsorption is considered(4). n-Nonane's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of n-nonane from dry soil surfaces may exist(SRC) based upon the vapor pressure(1).
Literature: (1) Daubert TE, Danner RP; Physical and Thermodynamic Properties of Pure Chemicals Data Compilation. Washington, DC: Taylor and Francis (1989) (2) Riddick JA et al; Techniques of Chemistry. 4th ed. Volume II. Organic Solvents. New York, NY: John Wiley and Sons (1985) (3) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (4) US EPA; EXAMS II Computer Simulation (1987)
The Koc of n-nonane is estimated as 8.0X10+4(SRC), using a log Kow of 5.65(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that n-nonane is expected to be immobile in soil. Freundlich absorption coefficients of log 4.50 and log 4.01 were measured in Oberlausitz lignite (11.1% moisture content; 53.5 wt% carbon content; 0.6 wt % nitrogen content) and Pahokee peat soil (10.2% moisture content; 46.1 wt% carbon content; 3.3 wt % nitrogen content), respectively(4).
Literature: (1) Sangster J; LOGKOW Database. A databank of evaluated octanol-water partition coefficients (Log P). Available from, as of Oct 30, 2013: http://logkow.cisti.nrc.ca/logkow/search.html (2) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of Oct 30, 2013: http://www.epa.gov/oppt/exposure/pubs/episuitedl.htm (3) Swann RL et al; Res Rev 85: 17-28 (1983) (4) Endo S et al; Environ Sci Technol 42): 5897-5903 (2008)