ARS PESTICIDE PROPERTIES DATABASE last updated May 1995 name: HEPTACHLOR CASRN: 76-44-8 molecular formula: C10H5CL7 molecular weight: 373.3 physical state: S (L=liquid; G=gas; S=solid) reference: 9ACHB2 1983 __________________________________________________________________________ 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): 135 - 145 AT 1-1.5 MM HG H 6MONTG Melting point (deg C): 95 - 96 H 9PME10 Decomposition point (deg C): Heat of vaporization (deg C): --RATE CONSTANTS-- Hydrolysis (per day): 0.128 25 4.5 H 6MONTG 0.160 25 5.0 H 6MONTG 0.155 25 6.0 H 6MONTG 0.155 25 7.0 H 6MONTG 0.230 25 8.0 H 6MONTG Photolysis (per day): Vapor pressure (mPa): 40 25 C 6RENCT 99: 120-164 (1987) H 9FACHB 1990 53* 25 H JEVGAA 12: 195-197 (1983) H 9ACHB2 1983 H 9PME10 30 R RREVAH 103: 1-59 (1988) Water solubility (ppm): 0.056* 25-29 H 9PMED9 H 9ACHB2 1983 0.18 25 R 6EXTOX 0.030 C ESTHAG 14: 553-556 (1980) Organic solubility (ppm): SOLUBLE IN MANY ORGANIC SOLVS. H 6MONTG Henrys law (Pa m3/mol): 353.3 25 H 9PME10 Octanol/water partitioning (log Kow): 4.4-5.5 H 6MONTG Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH reference -------- ----- -- --- --- -- --------- 661000 RREVAH 103: 1-59 (1988) CMSHAF 10: 833-846 (1981) 30000 ESTHAG 14: 553-556 (1980) 24000* JEVQAA 16: 422-428 (1987) 13330 ETOCDK 8: 339-357 (1989) Field dissipation halflife(days): value test area pH source reference ----- --------- -- ------ --------- 182-1277 R 6EXTOX 40-69 C 6JENEN 114: 689-703 (1988) 2000 C JEVQAA 16: 422-428 (1987) R RREVAH 85: 139-147 (1983) 2000 C SCSFAD 44: 1-8 (1985) 336-551 P 6USEPA 330,227,246 C 8CREAM 109 C ETOCDK 8: 339-357 (1989) 270-300 H 9ACHB2 1983 426 C 9EINSP pp. 23-67 (1980) 250* W Halflife in soil: soiltype aerobic anaerobic source reference -------- ------- --------- ------ --------- Comments: