ABSTRACT
CASRN: 134-32-7; DOT: 2077; DOT label: Poison; molecular formula: C10H9N; FW: 143.19; RTECS: QM1400000; Merck Index: 12, 6485 Physical state, color, and odor: White to yellow crystals or rhombic needles with an unpleasant odor. Becomes purplish-red on exposure to air. Odor threshold concentrations were 140-290 µg/m3 (quoted, Keith and Walters, 1992). Melting point (°C): 50 (Weast, 1986) Boiling point (°C): Sublimes at 300.8 (Weast, 1986). Density (g/cm3): 1.1229 at 25/25 °C (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.67 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: 3.92 at 25 °C (Dean, 1973) Flash point (°C): 158.5 (NIOSH, 1997) Henry’s law constant (atm⋅m3/mol): 6.13 x 10-10 at 25 °C (thermodynamic method-GC/UV spectrophotometry, Altschuh et al., 1999) Ionization potential (eV): 7.09-7.39 (Mallard and Linstrom, 1998) Soil organic carbon/water partition coefficient, log Koc: 3.51 (average of 3 soils, Graveel et al., 1986) Octanol/water partition coefficient, log Kow: 2.27 (quoted, Sangster, 1989) Solubility in organics: Soluble in alcohol, ether (Weast, 1986), naphtha, and single-ringed aromatic hydrocarbons.
