ABSTRACT
Cl Cl CASRN: 75-27-4; DOT: 2810; molecular formula: CHBrCl2; FW: 163.83; RTECS: PA5310000; Merck Index: 12, 1438 Physical state and color: Clear, colorless liquid Melting point (°C): -57.1 (Weast, 1986) Boiling point (°C): 87 (Acros Organics, 2002) Density (g/cm3): 1.980 at 20 °C (Weast, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.98 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): None (Dean, 1987) Henry’s law constant (x 10-4 atm⋅m3/mol): 2.12 at 25 °C (gas stripping-GC, Warner et al., 1987) 16 at 20 °C (Nicholson et al., 1984) 16, 26, and 40 at 20, 30, and 40 °C, respectively (Tse et al., 1992) In seawater (salinity 30.4‰): 5.52, 10.51, and 18.97 at 0, 10, and 20 °C, respectively (Moore et
al., 1995) Ionization potential (eV): 10.88 ± 0.05 (Franklin et al., 1969) Soil organic carbon/water partition coefficient, log Koc: 1.77 (estimated, Ellington et al., 1993) 1.79 (estimated, Schwille, 1988) Octanol/water partition coefficient, log Kow: 1.88 (quoted, Mills et al., 1985) 2.10 (Hansch and Leo, 1979; Mabey et al., 1982) Solubility in organics: Soluble in acetone, ethanol, benzene, chloroform, and ether (Weast, 1986) Solubility in water (mg/L): 2,968 at 30 °C (vapor equilibrium-GC, McNally and Grob, 1984) 3,031.9 at 30 °C (vapor equilibrium-GC, McNally and Grob, 1983)
6.70 g/L at 25 °C, 5.66 (air = 1) Vapor pressure (mmHg): 50 at 20 °C (Dreisbach, 1952) Environmental fate: Biological. Bromodichloromethane showed significant degradation with gradual adaptation in a static-culture flask-screening test (settled domestic wastewater inoculum) conducted at 25 °C. At concentrations of 5 and 10 mg/L, percent losses after 4 wk of incubation were 59 and 51, respectively. At a substrate concentration of 5 mg/L, 8% was lost due to volatilization after 10 d (Tabak et al., 1981). Chemical/Physical. The estimated hydrolysis half-life in water at 25 °C and pH 7 is 137 yr (Mabey and Mill, 1978). Reported products of hydrolysis include carbon monoxide, hydrochloric and hydrobromic acids (Ellington et al., 1993; Kollig, 1993). At influent concentrations of 1.0, 0.1, 0.01, and 0.001 mg/L, the GAC adsorption capacities at pH 5.3 were 7.9, 1.9, 0.47, and 0.12 mg/g, respectively (Dobbs and Cohen, 1980). Toxicity: Acute oral LD50 for rats 916 mg/kg, mice 450 mg/kg (quoted, RTECS, 1985). Drinking water standard (final): MCLG: zero; MCL: 0.08 mg/L. Total for all trihalomethanes cannot exceed a concentration of 0.08 mg/L. In addition, a DWEL of 700 µg/L was recommended (U.S. EPA, 2000). Source: By-product in chlorination of drinking water and use of fire extinguishers (quoted, Verschueren, 1983). Uses: Component of fire extinguisher fluids; solvent for waxes, fats, and resins; degreaser; flame retardant; heavy liquid for mineral and salt separations; chemical intermediate; laboratory use.
