ABSTRACT

CASRN: 75-61-6; DOT: 1941; molecular formula: CBr2F2; FW: 209.82; RTECS: PA7525000 Physical state, color, and odor: Colorless liquid or gas with a characteristic odor Melting point (°C): -142 to -141 (Aldrich, 1990) Boiling point (°C): 22-23 (Aldrich, 1990) Density (g/cm3): 2.3063 at 15 °C (quoted, Horvath, 1982) 2.297 at 20 °C (Aldrich, 1990) Diffusivity in water (x 10-5 cm2/sec): 0.93 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): Noncombustible (NIOSH, 1997) Henry’s law constant (x 10-2 atm⋅m3/mol): 1.72 at 26 °C (static headspace-GC, Saini et al., 2002) Ionization potential (eV): 11.07 (NIOSH, 1997) Solubility in organics: Soluble in acetone, alcohol, benzene, and ether (Weast, 1986) Vapor density: 8.58 g/L at 25 °C, 7.24 (air = 1) Vapor pressure (mmHg): 688 at 20 °C (calculated using constants for the Antoine equation) (Kudchadker et al., 1979) Exposure limits: NIOSH REL: TWA 100 ppm (860 mg/m3), IDLH 2,000 ppm; OSHA PEL: TWA 100 ppm. Symptoms of exposure: Inhalation may cause headache and drowsiness (Patnaik, 1992) Toxicity: A 15-min exposure to 6,400 and 8,000 ppm were fatal to rats and mice, respectively (Patnaik, 1992).