ABSTRACT
CASRN: 496-11-7; DOT: 1993; molecular formula: C9H10; FW: 118.18; RTECS: NK3750000; Merck Index: 12, 4966 Physical state: Liquid Melting point (°C): -51.4 (Weast, 1986) -51.0 (Bjørrseth, 1983) Boiling point (°C): 178 (Weast, 1986) Density (g/cm3): 0.9639 at 20 °C (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.71 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: >14 (Schwarzenbach et al., 1993) Flash point (°C): 50 (Aldrich, 1990) Entropy of fusion (cal/mol⋅K): 9.266 (Mallard and Linstrom, 1998) Henry’s law constant (x 10-3 atm⋅m3/mol): 2.14 at 25 °C (approximate - calculated from water solubility and vapor pressure) Soil organic carbon/water partition coefficient, log Koc: 2.48 using method of Karickhoff et al. (1979) Octanol/water partition coefficient, log Kow: 3.33 (Hansch and Leo, 1985) Solubility in organics: Soluble in alcohol, ether (Weast, 1986), and many aliphatic hydrocarbons (hexane, pentane), and aromatic hydrocarbons (benzene) Solubility in water: 88.9 mg/kg at 25 °C (shake flask-GLC, Price, 1976) 109.1 mg/kg at 25 °C (shake flask-fluorescence, Mackay and Shiu, 1977)
7.5 wt % indan, MacIntyre and deFur, 1985)
Vapor density: 4.83 g/L at 25 °C, 4.08 (air = 1) Vapor pressure (mmHg): 1.5 at 25 °C (extrapolated, Ambrose and Sprake, 1975) Environmental fate: Photolytic. Gas-phase reaction rate constants for OH radicals, NO3 radicals, and ozone at 24 °C were 1.9 x 10-11, 6.6 x 10-15, and <3 x 10-19 cm3/molecule⋅sec, respectively (Kwok et al., 1997). Source: Detected in distilled water-soluble fractions of 87 octane gasoline (0.40 mg/L), 94 octane gasoline (0.23 mg/L), Gasohol (0.50 mg/L), No. 2 fuel oil (0.05 mg/L), jet fuel A (0.15 mg/L), and diesel fuel (0.06 mg/L) (Potter, 1996). Based on laboratory analysis of 7 coal tar samples, indan concentrations ranged from ND to 3,800 ppm (EPRI, 1970). Use: Organic synthesis.
