ABSTRACT
CASRN: 1640-89-7; molecular formula: C7H14; FW: 98.19; RTECS: GY4450000 Physical state and color: Colorless, flammable liquid Melting point (°C): -138.4 (Weast, 1986) Boiling point (°C): 103.45 (Kay, 1947) Density (g/cm3): 0.7666 at 20 °C (Kay, 1947) Diffusivity in water (x 10-5 cm2/sec): 0.76 at 20 °C using method of Hayduk and Laudie (1974) Dissociation constant, pKa: >14 (Schwarzenbach et al., 1993) Flash point (°C): 15 (Aldrich, 1990) Lower explosive limit (%): 1.1 (Hawley, 1981) Upper explosive limit (%): 6.7 (Hawley, 1981) Heat of fusion (kcal/mol): 1.642-1.889 (Dean, 1987) Henry’s law constant (x 10-3 atm⋅m3/mol): 2.10 at 25 °C (approximate - calculated from water solubility and vapor pressure) Ionization potential (eV): 10.12 (Lias et al., 1998) 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. Based on its high solubility in water, adsorption is not expected to be a dominant process. Octanol/water partition coefficient, log Kow: 1.90 using method of Hansch et al. (1968)
Soluble in acetone, alcohol, benzene, ether, and petroleum (Weast, 1986) Solubility in water: In mg/kg: 21.9 at 70.5 °C, 52.5 at 113 °C, 224 at 168.5 °C, 759 at 203 °C (Guseva and Parnov,
1964) Vapor density: 4.01 g/L at 25 °C, 3.39 (air = 1) Vapor pressure (mmHg): 39.9 at 25 °C (Wilhoit and Zwolinski, 1971) Environmental fate: Chemical/Physical. Complete combustion in air yields carbon dioxide and water vapor. Ethylcyclopentane will not hydrolyze because it has no hydrolyzable functional group. Uses: Organic research.
