ABSTRACT
CASRN: 76-12-0; DOT: 1078; molecular formula: C2Cl4F2; FW: 203.83; RTECS: KI1420000 Physical state, color, and odor: Clear, colorless liquid or solid with a faint, ethereal or camphor-like odor. Evaporates quickly when spilled. Melting point (°C): 25 (Weast, 1986) Boiling point (°C): 91.58 (Boublik et al., 1984) Density (g/cm3): 1.6447 at 25 °C (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.89 at 25 °C using method of Hayduk and Laudie (1974) Flash point (°C): Noncombustible (NIOSH, 1997) Henry’s law constant (atm⋅m3/mol): 0.102 at 25 °C (approximate - calculated from water solubility and vapor pressure) Ionization potential (eV): 11.30 (NIOSH, 1997) Soil organic carbon/water partition coefficient, log Koc: 2.78 using method of Chiou et al. (1979) Octanol/water partition coefficient, log Kow: 3.39 using method of Hansch et al. (1968) Solubility in organics: Soluble in alcohol, chloroform, and ether (Weast, 1986). Miscible in many halogenated hydrocarbons, e.g., chloroform, caterbon tetrachloride, etc. Solubility in water: 120 mg/L at 25 °C (Du Pont, 1966) Vapor density: 8.33 g/L at 25 °C, 7.04 (air = 1)
40 at 20 °C (NIOSH, 1997) 45.8 at 25 °C (Boublik et al., 1984) Exposure limits: NIOSH REL: TWA 500 ppm (4,170 mg/m3), IDLH 2,000 ppm; OSHA PEL: TWA 500 ppm (adopted). Toxicity: Acute oral LD50 for mice 800 mg/kg (quoted, RTECS, 1985). LD50 (inhalation) for mice 123 gm/m3/2-h (quoted, RTECS, 1985). Uses: Organic synthesis.
