| Boiling Point | | Degree | Reference |
|---|
| 195 deg C @ 760 mm Hg | Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 1591 |
|
| Volatilization | The Henry's Law constant for 4-thiocresol is estimated as 3.6X10-4 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that 4-thiocresol is expected to volatilize from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life of the neutral species from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 3 hrs(SRC). The volatilization half-life of the neutral species from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 5.2 days(SRC). A pKa of 6.82(3) for 4-thiocresol indicates that the anionic form of 4-thiocresol will exist in slightly acidic to basic waters and the anionic form is not expected to volatilize from water(SRC). 4-Thiocresol's Henry's Law constant(1) indicates that volatilization of the neutral species from moist soil surfaces may occur(SRC). However, 4-thiocresol in the anionic form is not expected to volatilize. 4-Thiocresol is not expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 0.807 mm Hg(4).
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) Serjeant, E.P., Dempsey B.; Ionisation Constants of Organic Acids in Aqueous Solution. International Union of Pure and Applied Chemistry (IUPAC). IUPAC Chemical Data Series No. 23. NY, NY: Pergamon Press, Inc. p. 279 (1979) (4) Dykyj J, Repas M; Petrochemia 18: 179-98 (1973) |
| Solubility | Insol in water; sol in alcohol, ether
Literature: Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 1591 |
| Soil Adsorption | Using a structure estimation method based on molecular connectivity indices(1), the Koc for 4-thiocresol can be estimated to be 430(SRC). According to a classification scheme(2), this estimated Koc value suggests that 4-thiocresol is expected to have moderate mobility in soil. The pKa of 4-thiocresol is 6.82(3) indicating that the anionic form of 4-thiocresol will exist in slightly acidic to basic soils and anions are expected to have higher mobility than the neutral species(SRC). Volatilization from moist soil surfaces is not expected to be an important fate process for the anionic species.
Literature: (1) Meylan WM et al; Environ Sci Technol 26: 1560-67 (1992) (2) Swann RL et al; Res Rev 85: 17-28 (1983) (3) Serjeant EP, Dempsey B; Ionisation Constants of Organic Acids in Aqueous Solution. International Union of Pure and Applied Chemistry (IUPAC). IUPAC Chemical Data Series No. 23. NY, NY: Pergamon Press, Inc. p. 279 (1979) |
| Vapor Pressure | | Pressure | Reference |
|---|
| 0.807 mm Hg @ 25 deg C | Dykyj J, Repas M; Petrochemia 18: 179-98 (1973) |
|
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