|265-266 DEG C @ 755 MM HG||Budavari, S. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 1996., p. 1468|
The Henry's Law constant for 3-methylindole is estimated as 2.1X10-6 atm-cu m/mole(SRC) from its extrapolated value for vapor pressure, 0.005 mm Hg(1), and experimental water solubility, 498 mg/l(2). This value indicates that 3-methylindole will volatilize from water surfaces(3,SRC). 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) is estimated as approximately 20 days(3,SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec) is estimated as approximately 148 days(3,SRC). 3-Methylindole's Henry's Law constant(1,2,SRC) indicates that volatilization from moist soil surfaces will not be important(SRC).
Literature: (1) Perry RH, Green D; Perry's Chemical Handbook. Physical and Chemical Data. NY,NY: Mcgraw-Hill 6th ed (1984) (2) Pearlman RS et al; J Chem ref Data 13: 555-562 (1984) (3) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington DC: Amer Chem Soc pp. 15-1 to 15-29 (1990)
The Koc of 3-methylindole is estimated as approximately 600(SRC), using an experimental log Kow of 2.60(1,SRC) and a regression-derived equation(2,SRC). According to a recommended classification scheme(3), this estimated Koc value suggests that 3-methylindole has low mobility in soil(SRC). The value of Koc may be influenced by the pH of the soil for this compound due to the basic nature of the amine group(SRC).
Literature: (1) Hansch C et al; Exploring QSAR Hydrophobic, Electronic and Stearic Constants Washington DC: Amer Chem Soc (1995) (2) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington DC: Amer Chem Soc pp. 4-9 (1990) (3) Swann RL et al; Res Rev 85: 23 (1983)