ABSTRACT
CASRN: 763-29-1; DOT: 2288; molecular formula: C6H12; FW: 84.16; RTECS: SB2230000 Physical state, color, and odor: Clear, colorless flammable liquid with an unpleasant hydrocarbon odor. Melting point (°C): -135.7 (Weast, 1986) Boiling point (°C): 62.11 (Wilhoit and Zwolinski, 1971) Density (g/cm3): 0.6799 at 20 °C, 0.6751 at 25 °C (Dreisbach, 1959) Diffusivity in water (x 10-5 cm2/sec): 0.78 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: >14 (Schwarzenbach et al., 1993) Flash point (°C): -26.1 (Dean, 1987) Henry’s law constant (atm⋅m3/mol): 0.28 at 25 °C (Mackay and Shiu, 1981) Ionization potential (eV): 9.08 (Lias, 1998) Soil organic carbon/water partition coefficient, log Koc: Unavailable because experimental methods for estimation of this parameter for aliphatic hydrocarbons are lacking in the documented literature Octanol/water partition coefficient, log Kow: 2.54 using method of Hansch et al. (1968) Solubility in organics: Soluble in alcohol, benzene, chloroform, petroleum (Weast, 1986); miscible in pentane, cyclohexene, and other hydrocarbons. Solubility in water: 78 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966) Vapor density: 3.44 g/L at 25 °C, 2.91 (air = 1)
195.4 at 25 °C (Wilhoit and Zwolinski, 1971) Environmental fate: Photolytic. The reported reaction rate constants for the reaction of 2-methyl-1-pentene with OH radicals and ozone in the atmosphere are 1.05 x 10-17 and 6.26 x 10-11 cm3/molecule⋅sec, respectively (Atkinson and Carter, 1984; Atkinson, 1985). Chemical/Physical. Complete combustion in air yields carbon dioxide and water. Toxicity: LC50 (inhalation) for mice 127 g/m3/2-h, rats 115 g/3/4-h (quoted, RTECS, 1985). Source: California Phase II reformulated gasoline contained 2-methyl-1-pentene at a concentration of 1.25 g/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 0.23 and 26.6 mg/km, respectively (Schauer et al., 2002). Uses: Flavors; perfumes; medicines; dyes; oils; resins; organic synthesis.
