The Henry's Law constant for pristane is estimated as 68 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that pristane is expected to volatilize rapidly from water surfaces(2). 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 1.6 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 6.5 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 greater than 2 years if adsorption is considered (4). Pristane's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). However, this process is expected to be attenuated by adsorption. Pristane is not expected to volatilize from dry soil surfaces(SRC) based upon an estimated vapor pressure of 4.4X10-3 mm Hg(SRC), determined from a fragment constant method(3).
Literature: (1) Meylan WM, Howard PH; Environ Toxicol Chem 10: 1283-93 (1991) (2) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (3) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of November 7, 2016: http://www2.epa.gov/tsca-screening-tools (4) US EPA; EXAMS II Computer Simulation (1987)
In water, 1.0X10-8 mg/L at 25 deg C
Literature: Yalkowsky, S.H., He, Yan, Jain, P. Handbook of Aqueous Solubility Data Second Edition. CRC Press, Boca Raton, FL 2010, p. 1212
Literature: #Soluble in most organic solvents
Literature: Larranaga, M.D., Lewis, R.J. Sr., Lewis, R.A.; Hawley's Condensed Chemical Dictionary 16th Edition. John Wiley & Sons, Inc. Hoboken, NJ 2016., p. 1134
Literature: #Very soluble in benzene, ether, chloroform, petroleum ether
Literature: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-506
Literature: #Soluble in carbon tetrachloride
Literature: O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p. 1437
Using a structure estimation method based on molecular connectivity indices(1), the Koc of pristane can be estimated to be 1.8X10+5(SRC). According to a classification scheme(2), this estimated Koc value suggests that pristane is expected to be immobile in soil(SRC).
Literature: (1) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of Nov 7, 2016: http://www2.epa.gov/tsca-screening-tools (2) Swann RL et al; Res Rev 85: 17-28 (1983)