p,p′-DDT

Cl Cl Note: According to IARC (1979), technical grade p,p′-DDT (77.1 wt %) typically contains o,p′- DDT (14.9 wt %), p,p′-DDD (0.3 wt %) o,p′-DDD (0.1 wt %), p,p′-DDE (4.0 wt %), o,p′-DDE (0.1 wt %), and unidentified compounds (3.5 wt %). CASRN: 50-29-3; DOT: 2761; DOT label: Poison; molecular formula: C14H9Cl5; FW: 354.49; RTECS: KJ3325000; Merck Index: 12, 2898 Physical state, color, odor, and taste: Whites crystals or waxy solid, with a faint, fragrant, aromatic-like odor. Tasteless. Odor threshold concentration is 200 ppb (quoted, Keith and Walters, 1992) and in water, 350 µg/kg (Sigworth, 1964). Melting point (°C): 109.8 (Plato and Glasgow, 1969) Boiling point (°C): 260 (Weast, 1986) Decomposes (ATSDR, 1995) Density (g/cm3): 1.56 at 15 °C (Weiss, 1986) Diffusivity in water (x 10-5 cm2/sec): 0.37 at 20 °C using method of Hayduk and Laudie (1974) Flash point (°C): 72.3-77.3 (NIOSH, 1997) Entropy of fusion (cal/mol⋅K): 16.5 (Plato and Glasgow, 1969)

6.300 (DSC, Plato and Glasgow, 1969) Henry’s law constant (x 10-5 atm⋅m3/mol): 3.8 (Eisenreich et al., 1983) 5.2 (Jury et al., 1983) 10.3 (Jury et al., 1984a) 1.29 at 23 °C (fog chamber-GC, Fendinger et al., 1989) 0.83 at 25 °C (thermodynamic method-GC/UV spectrophotometry, Altschuh et al., 1999) 0.188 at 5 °C, 0.513 at 15 °C, 0.681 at 20 °C, 0.957 at 25 °C, 2.76 at 35 °C; in 3% NaCl solution:

1.15 at 5 °C, 1.88 at 15 °C, 3.36 at 25 °C, 5.43 at 35 °C (gas stripping-GC, Cetin et al., 2006) Bioconcentration factor, log BCF: 3.97 (algae, Geyer et al., 1984) 4.15 (activated sludge), 3.28 (golden ide) (Freitag et al., 1985) 4.53 (freshwater fish), 4.49 (fish, microcosm) (Garten and Trabalka, 1983) 4.81, 4.86, 4.95, 4.97, 4.99 (Oncorhynchus mykiss, Devillers et al., 1996) 3.67 (alga), 3.41 (Daphnia pulex), 3.56 (snail), 3.38 (carp) (quoted, Verschueren, 1983) Soil organic carbon/water partition coefficient, log Koc: 5.146 (silt soil loam, Chiou et al., 1979) 5.14 (Schwarzenbach and Westall, 1981) 5.20 (Commerce soil), 5.17 (Tracy soil), 5.18 (Catlin soil) (McCall et al., 1981) 6.26 (marine sediments, Pierce et al., 1974) 5.39 (Rao and Davidson, 1980) 5.68 (Taichung soil: pH 6.8, % sand: 25, % silt: 40, % clay: 35) (Ding and Wu, 1995) 6.7 (average using 7 sediment samples from the St. Clair and Detroit Rivers, Lau et al., 1989) 6.24 (Mivtahim soil), 5.95 (Gilat soil), 5.79 (Neve Yaar soil), 5.46 (Malkiya soil), 5.87 (Kinneret

sediment), 5.77 (Kinneret-G sediment) (Gerstl and Mingelgrin, 1984) 5.63 (estimated from HPLC capacity factors, Hodson and Williams, 1988) Octanol/water partition coefficient, log Kow: 6.36 (shake flask-GC, Chiou et al., 1982) 6.19 (centrifuge flask-GLC Freed et al., 1977, 1979a) 5.76 (Travis and Arms, 1988) 5.98 at 20 °C (shake flask-GC, Briggs, 1981; Mackay and Paterson, 1981) 6.16, 6.17, 6.22, 6.44 (shake flask-HPLC, Brooke et al., 1986) 6.21 (estimated from HPLC capacity factors, Eadsforth, 1986) 6.28 (Geyer et al., 1984) 4.89 (Wolfe et al., 1977) 5.44 (Gerstl and Mingelgrin, 1984; estimated using HPLC-MS, Burkhard et al., 1985a) 6.914 at 25 °C (shake flask-GLC, de Bruijn et al., 1989; shake flask-HPLC, Brooke et al., 1990) 6.307 at 25 °C (shake flask-HPLC, Brooke et al., 1990) 6.38 (estimated from HPLC capacity factors, Hammers et al., 1982) 6.00 at 25 °C (generator column-GC, Paschke et al., 1998) 5.94 at 25 °C (shake flask-GLC, Ellgehausen et al., 1981) An aggregate average value of 6.24 at 20 to 25 °C was reported based on 8 independent laboratory

determinations (slow stirring-GC, Tolls et al., 2003) Solubility in organics: In g/L: Benzyl benzoate (420), carbon tetrachloride (450), chlorobenzene (740), cyclohexanone

(110), pine oil (100-160), tetralin (610), tributyl phosphate (500) (Windholz et al., 1983).