ARS PESTICIDE PROPERTIES last update May 1995 name:PERMETHRIN CASRN: 52645-53-1 molecular formula: C21H20CL2O3 molecular weight : 391.28 physical state : L (L=liquid; G=gas; S=solid) reference: 9PMED8,8TH ED.,P.647,1987 _________________________________________________________________________ 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): 200 - 0.05mmHg H 9ACHB2,2ND ED,1987 Melting point(deg C): - Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): STABLE* 25 5,7 M 9FMCC3 0.0139* 25 9 M 9FMCC3 Photolysis (per day): 0.021* SOIL 25 M 9FMCC3 0.023* WATER 25 M 9FMCC3 Vapor pressure (mPa): 2.9E-3* 25 M 8ICIAG 0.9E-3 25 M 8ICIAG 2.0E-2 20 R ACSMC8, 255:201,1984 4.5E-2 25 H 9ACHB2,2ND ED.,1987 2.0E-3 25 M 9FMCC3 Water solubility (ppm): -temp- -source- -reference- 0.006* 20 M 9FMCC3 2.0E-1 30 H 9PMED8,8TH ED.,p.647,1987 0.2 20 M 9FMCC3 0.0069 (pH5.1) 20 M 8ICIAG 0.0061 (pH7.3) 20 M 8ICIAG 0.00069 (pH9.2) 20 M 8ICIAG Organic solubility (ppm): >5.0E+5* METHANOL 25 M 9FMCC3 >5.0E+5* XYLENE 25 M 9FMCC3 >5.0E+5* HEXANE 25 M 9FMCC3 >1.0E+6* XYLENE 25 H 9ACHB2,2ND ED.,1987 >1.0E+6* HEXANE 25 H 9ACHB2,2ND ED.,1987 2.6E+5* METHANOL 25 H 9ACHB2,2ND ED.,1987 Henrys law (Pa m3/mol): 0.189* 20-25 M 9FMCC3 Octanol/water partitioning (log Kow): 6.1* 20 M 8ICIAG 03/01/90 Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH source reference 10471 R EESADV, 4:34,1980 86000 M 9FMCC3 33300 C 8GLEAM SLT LM(OH) 236 19340 0.71 M 9FMCC3 SNDY LM(WI) 217 20865 0.60 M 9FMCC3 SEDIMENT(GA) 401 44070 0.91 M 9FMCC3 SAND(FL) 140 60870 0.13 M 9FMCC3 39,300* Field Dissipation halflife(days): value test area pH source reference 6 C 8GLEAM 106 R RREVAH 97:93-100,1986 9-54(AV.32) M 9FMCC3 7-14(AV.10) M 8ICIAG <33 M 9FMCC3 ca60 M 9FMCC3 30-60 M 9FMCC3 42(6-106)* 30-50 M 9FMCC3 Halflife in soil: Soiltype aerobic anaerobic source reference 30* 108* M 9FMCC3 Comments: AEROBIC =30(4-40), ANAEROBIC = 108(3-204)