ABSTRACT
Note: Typically inhibited with 10 ppm hydroquinone to prevent polymerization (Acros Organics, 2002). CASRN: 591-49-1; molecular formula: C7H12; FW: 96.17 Physical state, color, and odor: Clear, colorless, very flammable, watery liquid with a characteristically unpleasant, aromatic hydrocarbon-type odor. Melting point (°C): -121 (Weast, 1986) Boiling point (°C): 110 (Weast, 1986) Density (g/cm3): 0.8102 at 20 °C, 0.8058 at 25 °C (Dreisbach, 1959) Diffusivity in water (x 10-5 cm2/sec): 0.80 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: >14 (Schwarzenbach et al., 1993) Flash point (°C): -3 (Dean, 1987) Henry’s law constant (x 10-2 atm⋅m3/mol): 8.86 at 25 °C (approximate - calculated from water solubility and vapor pressure) Ionization potential (eV): 8.67 (Lias et al., 1998) Soil organic carbon/water partition coefficient, log Koc: Unavailable because experimental methods for estimation of this parameter for alicyclic hydrocarbons are lacking in the documented literature Octanol/water partition coefficient, log Kow: 2.44 using method of Hansch et al. (1968) Solubility in organics: Soluble in benzene and ether (Weast, 1986) and miscible with many hydrocarbons similar in chemical structure, e.g., cyclohexane, cyclohexene, etc.
