| Volatilization | The Henry's Law constant for citronellol is estimated as 2.1X10-5 atm-cu m/mole(SRC) derived from its vapor pressure, 0.02 mm Hg(1), and water solubility, 200 mg/L(2). This Henry's Law constant indicates that citronellol 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 2.4 days(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 21 days(SRC). Citronellol's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). Even though the vapor pressure is low environmentally at standard temperature and pressure, there is a detectable odor; therefore, citronellol may volatilize from dry soil(SRC). Patch testing to determine the evaporation rate of fragrance chemicals from skin found that citronellol evaporation was not sensitive to pH changes from 4.0 to 7.0 and that 26-27% of applied citronellol was lost within 40 minutes to 24 hours(4).
Literature: (1) Sell CS; Terpenoids. Kirk-Othmer Encyclopedia of Chemical Technology. (1999-2015). New York, NY: John Wiley & Sons. Online Posting Date: Sep 15, 2006. (2) Yalkowsky SH et al; Handbook of Aqueous Solubility Data. 2nd ed. Boca Raton, FL: CRC Press, p. 739 (2010) (3) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (4) Gilpin SJ et al; Dermatitis 20(4): 200-7 (2009) |
| Solubility | In water, 200 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. 739
Literature: #In water, 307 mg/L at 25 deg C; 300 mg/L at 20 deg C
Literature: ECHA; Search for Chemicals. Citronellol (CAS 106-22-9) Registered Substances Dossier. European Chemical Agency. Available from, as of July 16, 2015: http://echa.europa.eu/
Literature: #Soluble in fixed oils, propylene glycol; insoluble in glycerin
Literature: Lewis, R.J. Sr. (ed) Sax's Dangerous Properties of Industrial Materials. 12th Edition. Wiley-Interscience, Wiley & Sons, Inc. Hoboken, NJ. 2012., p. 1166
Literature: #Miscible in ethanol and ether /(+)-citronellol/; very soluble in ethanol and ether /(-)-citronellol/
Literature: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-216 |
| Soil Adsorption | Using a structure estimation method based on molecular connectivity indices(1), the Koc of citronellol can be estimated to be 94(SRC). According to a classification scheme(2), this estimated Koc value suggests that citronellol is expected to have high mobility in soil.
Literature: (1) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.11. Nov, 2012. Available from, as of July 17, 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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