ABSTRACT
CASRN: 75-28-5; DOT: 1011; DOT label: Flammable gas; molecular formula: C4H10; FW: 58.12; RTECS: TZ4300000 Physical state, color, and odor: Colorless, very flammable gas with a faint odor Melting point (°C): -159.4 (Weast, 1986) Boiling point (°C): -11.5 (Noyes and Mabery, 1908) Density (g/cm3): 0.5572 at 20 °C, 0.5510 at 25 °C (Dreisbach, 1959) Diffusivity in water (x 10-5 cm2/sec): 0.85 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: >14 (Schwarzenbach et al., 1993) Flash point (°C): -83 (Hawley, 1981) Lower explosive limit (%): 1.6 (NIOSH, 1997) Upper explosive limit (%): 8.4 (NFPA, 1984) Entropy of fusion (cal/mol⋅K): 9.541 (Aston et al., 1940) 9.496 (Parks et al., 1937) Heat of fusion (kcal/mol): 1.085 (Aston et al., 1940) 1.075 (Parks et al., 1937) Henry’s law constant (atm⋅m3/mol): 1.171 at 25 °C (Hine and Mookerjee, 1975) Ionization potential (eV): 10.68 (Lias, 1998) 10.79 (Collin and Lossing, 1959)
oc Unavailable because experimental methods for estimation of this parameter for aliphatic hydrocarbons are lacking in the documented literature Octanol/water partition coefficient, log Kow: 2.76 (Leo et al., 1975) Solubility in organics (mole fraction): In 1-butanol: 0.0897, 0.0491, and 0.0308 at 25, 30, and 70 °C, respectively; chlorobenzene: 0.157,
0.0837, and 0.0542 at 25, 30, and 70 °C, respectively; and octane: 0.301, 0.161, and 0.101 at 25, 30, and 70 °C, respectively (Hayduk et al., 1988).
