ARS PESTICIDE PROPERTIES DATABASE last updated May 1995 name: HEXACHLOROBENZENE(HCB) CASRN: 118-74-1 molecular formula: C6CL6 molecular weight: 284.8 physical state: S (L=liquid; G=gas; S=solid) reference: 9PME10 __________________________________________________________________________ Key to sources: (M)Manufacturer, (R)eview, (H)andbook,(E)xperiment, (C)alculated, (U)nknown, (P)EPA data, (W)auchope * denotes a selected value where multiple values of a property are listed. __________________________________________________________________________ value medium temp. pH source reference ----- ------ ----- -- ------ --------- Boiling point (deg C): 323 - 326 H 9PME10 Melting point (deg C): 227 - 230 H 6MONTG Decomposition point (deg C): Heat of vaporization (deg C): --RATE CONSTANTS-- Hydrolysis (per day): STABLE 85 3,7,11 H 6MONTG Photolysis (per day): Vapor pressure (mPa): 1.45 20 H 9PME10 H 6MONTG Water solubility (ppm): 0.005 25 R 6EXTOX 0.006 E 6RAOKR pp. 53-63 (1978) 0.040* 20 H 6MONTG Organic solubility (ppm): SOLUBLE IN HOT BENZENE,CS2, H 9PME10 CHLOROFORM AND DIETHYL ETHER Henrys law (Pa m3/mol): 10.32 20 H 6MONTG Octanol/water partitioning (log Kow): 3.93-6.42 H 6MONTG Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH reference -------- ----- -- --- --- -- --------- 10965 6GERST 1.71E6 ESTHAG 14: 553-556 (1980) 1.02E7 6EXTOX 8.65E5 6RAOKR pp. 53-63 (1978) 34674 CMSHAF 17: 67-77 (1988) 20893 CMSHAF 17: 67-77 (1988) 501 CMSHAF 17: 67-77 (1988) 363 CMSHAF 17: 67-77 (1988) 6730- JAFCAU 32: 243-6 (1984) 30764 462.8 30649 2.60 6MONTG 50000* W Field dissipation halflife(days): value test area pH source reference ----- --------- -- ------ --------- 985-2080 H 6DEGRA 1155 C 8CREAM 14(0-20CM) E WEESA6 31: 368-372 (1983) E JEVQAA 20: 420-424 (1991) 1000* W Halflife in soil: soiltype aerobic anaerobic source reference -------- ------- --------- ------ --------- Comments: