ABSTRACT

CASRN: 57-14-7; DOT: 1163 (asym), 2382 (sym); DOT label: Flammable liquid and poison; molecular formula: C2H8N2; FW: 60.10; RTECS: MV2450000; Merck Index: 13, 3296 Physical state, color, and odor: Clear, colorless fuming liquid with an amine-like odor. Turns yellow on exposure to air. Odor detection threshold concentrations ranged from 6.1 to 14 ppmv (Jacobson et al., 1955). Melting point (°C): -57.8 (NIOSH, 1997) Boiling point (°C): 63.9 (Windholz et al., 1983) Density (g/cm3): 0.7914 at 22 °C (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 1.04 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): -15.1 (NIOSH, 1997) Lower explosive limit (%): 2 (NIOSH, 1997) Upper explosive limit (%): 95 (NIOSH, 1997) Henry’s law constant (x 10-9 atm⋅m3/mol): 2.45 at 25 °C (quoted, Mercer et al., 1990) Ionization potential (eV): 7.67 ± 0.05 (Franklin et al., 1969) 8.05 (NIOSH, 1997) Soil organic carbon/water partition coefficient, log Koc: -0.70 (calculated, Mercer et al., 1990) Octanol/water partition coefficient, log Kow: -2.42 (quoted, Mercer et al., 1990) Solubility in organics: Miscible with alcohol, N,N-dimethylformamide, ether, hydrocarbons (Windholz et al., 1983), and many other polar solvents.