ARS PESTICIDE PROPERTIES DATABASE last updated May 1995 name: PENTACHLOROPHENOL CASRN: 87-86-5 molecular formula: C6HCL5O molecular weight: 266.3 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): 309 - 310 H 9PME10 Melting point (deg C): 190 - 191 H 6MONTG Decomposition point (deg C): 310 H 6MONTG Heat of vaporization (deg C): --RATE CONSTANTS-- Hydrolysis (per day): Photolysis (per day): 0.0105 UV WATER 90-95 H 6MONTG 0.037 SUNLIGHT DIST.H20 H 6MONTG 0.013 SUNLIGHT RIVER H20 H 6MONTG Vapor pressure (mPa): 1.6E4 100 H 9PMED9 14.6 20 H 6DEGRA 22.6* 20 H 6MONTG Water solubility (ppm): 80 30 H 9PME10 80 20 P 6USEPA 14* 20 H 6DEGRA 20 H 6MONTG 11-14 E ESTHAG 25: 654-661 (1990) 330000 (NA SALT - CASRN 131-52-2) H 9PME10 Organic solubility (ppm): SOLUBLE IN MOST ORGANIC SOLVS. H 9PME10 Henrys law (Pa m3/mol): 0.430 20 H 6MONTG Octanol/water partitioning (log Kow): 3.32-5.86 H 6MONTG Acid dissociation (pKa): 4.71 H 9PMED9 E JAFCAU 26: 189-192 (1978) 4.75 E ESTHAG 25: 654-661 (1990) 4.74* H 6MONTG Soil sorption: soiltype temp. Kd Koc %om pH reference -------- ----- -- --- --- -- --------- 900 ESTHAG 14: 553-556 (1980) 6ECBEN 4: 26-38 (1980) 262 RREVAH 103: 1-59 (1988) CMSHAF 10: 833-846 (1981) 23988 6GERST 35481 6GERST 38905 6GERST 3000- 6EXTOX 4000 39000 ESTHAG 18: 652-657 (1984) 35800 ESTHAG 18: 652-657 (1984) 23800 ESTHAG 18: 652-657 (1984) 20000* Field dissipation halflife(days): value test area pH source reference ----- --------- -- ------ --------- 23-178 H 6DEGRA 10-40 FLOODED R 9KHBCD pp. 129-208 COND. R GENVPE pp. 385-400 14-48 BACT.DEGR. R 6EXTOX 14 C 9EINSP pp.23-67 (1980) 10-20 E 6AGRON 43: 504-7 (1951) 10-70 (AV.30) FLOODED E 6SSPNU 21: 405-14 (1975) 20-120 (AV.50) UPLAND E 6SSPNU 21: 405-14 (1975) 10-17 RICEFIELD E 6RPPRE 9: 143-163 (1976) 48* W Halflife in soil Soiltype aerobic anaerobic source reference Comments: KOC VERY PH DEPENDENT