ABSTRACT
CASRN: 76-13-1; DOT: 1078; molecular formula: C2Cl3F3; FW: 187.38; RTECS: KJ4000000; Merck Index: 12, 2140 Physical state, color, and odor: Clear, colorless liquid with a carbon tetrachloride-like odor at high concentrations Melting point (°C): -36.4 (Weast, 1986) Boiling point (°C): 47.7 (Weast, 1986) Density (g/cm3): 1.5635 at 20 °C (Weast, 1986) 1.42 at 25 °C (Hawley, 1981) Diffusivity in water (x 10-5 cm2/sec): 0.79 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): Noncombustible at ordinary temperatures (NIOSH, 1997) Entropy of fusion (cal/mol⋅K): 2.03 (Golovanova and Kolesov, 1984) Heat of fusion (kcal/mol): 0.556 (Golovanova and Kolesov, 1984) Henry’s law constant (atm⋅m3/mol): 0.154, 0.215, 0.245, 0.319, and 0.321 at 10, 15, 20, 25, and 30 °C, respectively (EPICS, Ashworth et al., 1988) Ionization potential (eV): 11.99 ± 0.02 (Franklin et al., 1969) Soil organic carbon/water partition coefficient, log Koc: 2.59 using method of Chiou et al. (1979) Octanol/water partition coefficient, log Kow: 2.57 (Lesage et al., 1990)
Soluble in alcohol, benzene, and ether (Weast, 1986) Solubility in water: 136 mg/L at 10 °C (Lesage et al., 1990) 170 mg/L at 25 °C (Du Pont, 1966; Jones et al., 1977) In mg/kg: 38 at 10 °C, 37 at 20 °C, 14 at 30 °C (shake flask-GC, Howe et al., 1987) Vapor density: 7.66 g/L at 25 °C, 6.47 (air = 1) Vapor pressure (mmHg at 20 °C): 285 (NIOSH, 1997) 270 (quoted, Verschueren, 1983) Environmental fate: Biological. In an anoxic aquifer beneath a landfill in Ottawa, Ontario, Canada, there was evidence to suggest that 1,1,2-trichlorotrifluoroethane underwent reductive dehalogenation to give 1,2-difluoro-1,1,2-trichloroethylene and 1,2-dichloro-1,1,2-trifluoroethane. It was proposed that the latter compound was degraded via dehydrodehalogenation to give 1-chloro-1,1,2-trifluoroethylene (Lesage et al., 1990). Chemical/Physical. 1,1,2-Trichlorotrifluoroethane will not hydrolyze to any reasonable extent (Kollig, 1993). Exposure limits: NIOSH REL: TWA 1,000 ppm (7,600 mg/m3), STEL 1,250 ppm (9,500 mg/m3), IDLH 2,000 ppm; OSHA PEL: TWA 1,000 ppm, STEL 1,250 ppm (adopted). Symptoms of exposure: May produce a weak narcotic effect, cardiac sensitization, and irritation of respiratory passage (Patnaik, 1992) Toxicity: Acute oral LD50 for rats 43 mg/kg (quoted, RTECS, 1985). Drinking water standard: No MCLGs or MCLs have been proposed although 1,1,2-trichlorotrifluoroethane has been listed for regulation (U.S. EPA, 1996). Uses: Fire extinguishers; dry-cleaning solvent; manufacture of chlorotrifluoroethylene; refrigerant; polymer intermediate; blowing agent; drying electronic parts; extraction solvent for analyzing hydrocarbons, oils, and greases.
