ABSTRACT
CASRN: 91-17-8; DOT: 1147; molecular formula: C10H18; FW: 138.25; RTECS: QJ3150000; Merck Index: 12, 2903 Physical state, color, and odor: Clear, colorless, flammable liquid with a mild methanol or hydrocarbon-like odor Melting point (°C): -43 (cis), -30.4 (trans) (Weast, 1986) Boiling point (°C): 195.6 (cis), 187.2 (trans) (Weast, 1986) 193.0 (mixed isomers, García, 1943) Density (g/cm3): 0.8965 at 20 °C (cis), 0.8699 at 20 °C (trans) (Weast, 1986) 0.8928 at 24 °C (cis), 0.8664 at 24 °C (trans) (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec at 20 °C): 0.68 and 0.67 for cis and trans isomers, respectively, using method of Hayduk and Laudie (1974) Dissociation constant, pKa: >14 (Schwarzenbach et al., 1993) Flash point (°C): 58 (commercial mixture, Windholz et al., 1983) 58 (cis), 52 (trans) (Dean, 1987) Lower explosive limit (%): 0.7 at 100 °C (Sax and Lewis, 1987) Upper explosive limit (%): 4.9 at 100 °C (Sax and Lewis, 1987) Entropy of fusion (cal/mol⋅K): 14.19 (McCullough et al., 1957a) Heat of fusion (kcal/mol): 2.268 and 3.445 for the cis and trans isomers, respectively (quoted, Riddick et al., 1986) Henry’s law constant (x 10-2 atm⋅m3/mol): 7.00, 8.37, 10.6, 11.7, and 19.9 at 10, 15, 20, 25, and 30 °C, respectively (EPICS, Ashworth et al., 1988)
51.24 (cis), 50.7 (trans) (Demond and Lindner, 1993) 53.24 (cis), 51.29 (trans) (quoted, Fowkes, 1980) Soil organic carbon/water partition coefficient, log Koc: Unavailable because experimental methods for estimation of this parameter for alicyclic hydrocarbons are lacking in the documented literature Octanol/water partition coefficient, log Kow: 4.00 using method of Hansch et al. (1968) Solubility in organics: Soluble in acetone, alcohol, benzene, ether, and chloroform (Weast, 1986). Miscible with propanol, isopropanol, and most ketones and ethers (Windholz et al., 1983). Solubility in water (25 °C): 889 µg/kg (shake flask-GLC, Price, 1976) <0.2 mL/L (residue-volume method, Booth and Everson, 1948) 850 µg/L (shake flask-GC, Tolls et al., 2002) Vapor density: 5.65 g/L at 25 °C, 4.77 (air = 1) Vapor pressure (mmHg): 195.77 and 187.27 at 25 °C for cis and trans isomers, respectively (Wilhoit and Zwolinski, 1971) Environmental fate: Photolytic. The following rate constants were reported for the reaction of decahydronaphthalene and OH radicals in the atmosphere: 1.96 x 10-11 and 2.02 x 10-11 cm3/molecule⋅sec at 299 K for cis and trans isomers, respectively (Atkinson, 1985). A photooxidation reaction rate constant of 2.00 x 10-11 was reported for the reaction of decahydronaphthalene (mixed isomers) and OH radicals in the atmosphere at 298 K (Atkinson, 1990). Chemical/Physical. Decahydronaphthalene will not hydrolyze because it has no hydrolyzable functional group. Toxicity: EC50 (48-h) for Daphnia pulex 2,490 µg/L (Sanders and Cope, 1966). Acute oral LD50 for rats 4,170 mg/kg (quoted, RTECS, 1985). Uses: Solvent for naphthalene, waxes, fats, oils, resins, rubbers; motor fuel and lubricants; cleaning machinery; substitute for turpentine; shoe-creams; stain remover.
