ABSTRACT
CASRN: 832-69-9; molecular formula: C15H12; FW: 192.26; RTECS: SF7810000 Physical state and color: White powder or solid. Melting point (°C): 123 (Weast, 1986) Boiling point (°C): 358.6 (Wilhoit and Zwolinski, 1971) Density (g/cm3): 1.161 using method of Lyman et al. (1982) Diffusivity in water (x 10-5 cm2/sec): 0.55 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: >14 (Schwarzenbach et al., 1993) Ionization potential (eV): 7.70 (Rosenstock et al., 1998) Henry’s law constant (x 10-5 atm⋅m3/mol): 1.56, 2.33, 3.42, 4.93, and 6.68 at 4.1, 11.0, 18.0, 25.0, and 31.0 °C, respectively (Bamford et al., 1998) Soil organic carbon/water partition coefficient, log Koc: 4.56 using method of Karickhoff et al. (1979) Octanol/water partition coefficient, log Kow: 5.08 (HPLC retention time correlation, Wang et al., 1986) Solubility in organics: Soluble in alcohol (Weast, 1986) Solubility in water: In µg/L: 95.2 at 6.6 °C, 114 at 8.9 °C, 147 at 14.0 °C, 193 at 19.2 °C, 255 at 24.1 °C, 304 at 26.9 °C, 355 at 29.9 °C (coupled column-LC, May et al., 1978)
269 µg/L at 25 °C (generator column-HPLC/UV spectrophotometry, May et al., 1978a) 173 µg/L at 25 °C, 300 µg/L in seawater at 22 °C (quoted, Verschueren, 1983) In mole fraction (x 10-8): 0.8921 at 6.60 °C, 1.068 at 8.90 °C, 1.377 at 14.00 °C, 1.808 at 19.20 °C,
2.389 at 24.10 °C, 2.849 at 26.90 °C, 3.326 at 29.90 °C (generator column-HPLC, May et al., 1983)
value of 44.33 mg/L (Westerholm and Li, 1994). Identified in a South Louisiana crude oil at a concentration of 111 ppm (Pancirov and Brown, 1975). Schauer et al. (1999) reported 1methylphenanthrene in diesel fuel at a concentration of 28 µg/g and in a diesel-powered mediumduty truck exhaust at an emission rate of 17.0 µg/km. California Phase II reformulated gasoline contained 1-methylphenathrene at a concentration of 3.91 g/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were approximately 1.63 and 122 µg/km, respectively (Schauer et al., 2002). Schauer et al. (2001) measured organic compound emission rates for volatile organic compounds, gas-phase semi-volatile organic compounds, and particle-phase organic compounds from the residential (fireplace) combustion of pine, oak, and eucalyptus. The respective gas-phase and particle-phase emission rates of 1-methylphenanthrene were 2.22 and 0.579 mg/kg of pine burned and 1.04 and 0.050 mg/kg of oak burned. The gas-phase emission rate was 0.720 mg/kg of eucalyptus burned. Uses: Chemical research; organic synthesis.
