ABSTRACT
CASRN: 79-27-6; DOT: 2504; molecular formula: C2H2Br4; FW: 345.65; RTECS: KI8225000; Merck Index: 12, 9238 Physical state, color, and odor: Colorless to pale yellow liquid with a pungent odor resembling camphor and iodoform Melting point (°C): 0 (Weast, 1986) Boiling point (°C): 243.5 (Weast, 1986) Density (g/cm3): 2.8748 at 20 °C (Weast, 1986) 2.9529 at 25 °C (Dean, 1987) Diffusivity in water (x 10-5 cm2/sec): 0.79 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): Noncombustible liquid (NIOSH, 1997) Henry’s law constant (x 10-5 atm⋅m3/mol): 6.40 at 20 °C (approximate - calculated from water solubility and vapor pressure) Interfacial tension with water (dyn/cm at 20 °C): 38.82 (Harkins et al., 1920) Soil organic carbon/water partition coefficient, log Koc: 2.45 using method of Chiou et al. (1979) Octanol/water partition coefficient, log Kow: 2.91 using method of Hansch et al. (1968) Solubility in organics: Soluble in acetone and benzene (Weast, 1986). Miscible with chloroform (Windholz et al., 1983). Solubility in water: 0.07 wt % at 20 °C (NIOSH, 1997) 651 mg/L at 30 °C (quoted, Verschueren, 1983) Vapor density: 14.13 g/L at 25 °C, 11.93 (air = 1)
0.1 at 20 °C (quoted, Verschueren, 1983) Exposure limits: NIOSH REL: IDLH 8 ppm; OSHA PEL: 1 ppm (14 mg/m3). Toxicity: Acute oral LD50 for guinea pigs 400 mg/kg, mice 269 mg/kg, rats 1,100 mg/kg, rabbits 400 mg/kg (quoted, RTECS, 1985). Uses: Solvent; in microscopy; separating minerals by density.
