ABSTRACT
CASRN: 135-98-8; DOT: 2709; molecular formula: C10H14; FW: 134.22; RTECS: CY9100000; Merck Index: 12, 1585 Physical state and color: Clear, colorless liquid Melting point (°C): -75.5 (Weast, 1986) -82.7 (Windholz et al., 1983) Boiling point (°C): 173.34 (Wilhoit and Zwolinski, 1971) Density (g/cm3): 0.8621 at 20 °C (Weast, 1986) 0.8608 at 20 °C (Windholz et al., 1983) 0.8371 at 49.99 (Steele et al., 2002a) Diffusivity in water (x 10-5 cm2/sec): 0.68 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: >14 (Schwarzenbach et al., 1993) Flash point (°C): 62.7 (open cup, Hawley, 1981) 45 (Acros Organics, 2002) Lower explosive limit (%): 0.8 (Sax and Lewis, 1987) Upper explosive limit (%): 6.9 (Sax and Lewis, 1987) Henry’s law constant (x 10-2 atm⋅m3/mol): 1.14 at 25 °C (Hine and Mookerjee, 1975) Ionization potential (eV): 8.68 ± 0.01 (Franklin et al., 1969) Soil organic carbon/water partition coefficient, log Koc: 2.95 using method of Kenaga and Goring (1980)
ow 4.57 (estimated using HPLC retention time, Sherblom and Eganhouse, 1988) Solubility in organics: Miscible with alcohol, benzene, and ether (Windholz et al., 1983) Solubility in water (25 °C): 17.6 mg/L in distilled water, 11.9 mg/L in artificial seawater (shake flask-GC, Sutton and Calder,
1975) 309 mg/L solution (shake flask-UV spectrophotometry, Andrews and Keefer, 1950a) 87.6 µmol/L in 0.5 M NaCl (Wasik et al., 1984) Vapor density: 5.49 g/L at 25 °C, 4.63 (air = 1) Vapor pressure (mmHg): 1.1 at 20 °C (quoted, Verschueren, 1983) 1.90 at 25.00 °C (Růžička et al., 1994) Environmental fate: Chemical/Physical. sec-Butylbenzene will not hydrolyze because it has no hydrolyzable functional group (Kollig, 1995). Toxicity: Acute oral LD50 for rats 2,240 mg/kg (quoted, RTECS, 1985). Drinking water standard: No MCLGs or MCLs have been proposed (U.S. EPA, 1996). Uses: Solvent for coating compositions; plasticizer; surface-active agents; organic synthesis.
