ABSTRACT
CASRN: 78-87-5; DOT: 1279; DOT label: Flammable liquid; molecular formula: C3H6Cl2; FW: 112.99; RTECS: TX9625000; Merck Index: 12, 8039 Physical state, color, and odor: Clear, colorless liquid with a sweet, chloroform-like odor. The average least detectable odor threshold concentration in water at 60 °C was 0.10 mg/L (Alexander et al., 1982). Experimentally determined detection and recognition odor threshold concentrations were 1.2 mg/m3 (260 ppbv) and 2.4 mg/m3 (520 ppbv), respectively (Hellman and Small, 1974). Melting point (°C): -100.4 (Dreisbach, 1959) Boiling point (°C): 96.22 (Boublik et al., 1973) 96.0 (Banerjee et al., 1990) Density (g/cm3 at 20 °C): 1.15597 (quoted, Riddick et al., 1986) 1.1560 (Dreisbach, 1959) Diffusivity in water (x 10-5 cm2/sec): 0.90 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): 15.6 (NIOSH, 1997) Lower explosive limit (%): 3.4 (NIOSH, 1997) Upper explosive limit (%): 14.5 (NIOSH, 1997) Henry’s law constant (x 10-3 atm⋅m3/mol): 2.3 (Pankow and Rosen, 1988) 1.81 at 25 °C (static headspace-GC, Welke et al., 1998) 2.14 at 20.0 °C, 3.44 at 30.0 °C, 4.91 at 40.0 °C (equilibrium static cell, Wright et al., 1992) 4.71 at 37 °C (Sato and Nakajima, 1979) 2.07 at 25 °C (quoted, Howard, 1990) 1.22, 1.26, 1.90, 3.57, and 2.86 at 10, 15, 20, 25, and 30 °C, respectively (EPICS, Ashworth et al.,
1988) 2.1, 3.2, and 4.8 at 20, 30, and 40 °C, respectively (Tse et al., 1992) 2.19 at 20.00 °C (inert gas stripping, Hovorka and Dohnal, 1997) 2.88 at 25.0 °C (mole fraction ratio-GC, Leighton and Calo, 1981)
Dewulf et al., 1999)
Ionization potential (eV): 10.87 (NIOSH, 1997) Soil organic carbon/water partition coefficient, log Koc: 1.67 (Willamette silt loam, Chiou et al., 1979) Octanol/water partition coefficient, log Kow: 1.99 at 35 and 50 °C (GLC, Bhatia and Sandler, 1995) 2.00 (Hansch and Leo, 1979) Solubility in organics: Miscible with organic solvents (U.S. EPA, 1985). Solubility in water: 2,800 mg/kg at 25 °C (shake flask-interferometer, Gross, 1929) 2,700 mg/kg at 25 °C (McGovern, 1943) In mg/kg: 2,052 at 10 °C, 2,030 at 20 °C, 1,867 at 30 °C (shake flask-GC, Howe et al., 1987) 2,700 mg/L at 20 °C (Gunther et al., 1968) 2,740 mg/L at 25 °C (quoted, Howard, 1990) 2,069 mg/L at 30 °C (vapor equilibrium-GC, McNally and Grob, 1984) 2,420.4 mg/L at 30 °C (vapor equilibrium-GC, McNally and Grob, 1983) 2,096 mg/L at 25 °C (Jones et al., 1977) In wt %: 0.29 at 0 °C, 0.28 at 9.5 °C, 0.30 at 20.0 °C, 0.29 at 29.7 °C, 0.30 at 40.3 °C, 0.32 at 49.8
°C, 0.35 at 60.0 °C, 0.39 at 70.5 °C, 0.47 at 80.2 °C (shake flask-GC, Stephenson, 1992) Vapor density: 4.62 g/L at 25 °C, 3.90 (air = 1) Vapor pressure (mmHg): 40.0 at 20.5 °C, 59.9 at 28.9 °C, 80.0 at 34.9 °C (Steele et al., 1997a) 53.3 at 25 °C (Banerjee et al., 1990) Environmental fate: Biological. 1,2-Dichloropropane 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 89 and 81, respectively. The amount lost due to volatilization was only 0 to 3% (Tabak et al., 1981). Soil. Boesten et al. (1992) investigated the transformation of [14C]1,2-dichloropropane under laboratory conditions of three subsoils collected from the Netherlands (Wassenaar low-humic sand, Kibbelveen peat, Noord-Sleen humic sand podsoil). The groundwater saturated soils were incubated in the dark at 9.5-10.5 °C. In the Wassenaar soil, no transformation of 1,2dichloropropane was observed after 156 d of incubation. After 608 and 712 d, however, >90% degraded to nonhalogenated volatile compounds, which were detected in the headspace above the soil. These investigators postulated that these compounds can be propylene and propane in a ratio of 8:1. Degradation of 1,2-dichloropropane in the Kibbelveen peat and Noord-Sleen humic sand podsoil was not observed, possibly because the soil redox potentials in both soils (50-180 and 650-670 mV, respectively) were higher than the redox potential in the Wassenaar soil (10-20 mV).
