ARS PESTICIDE PROPERTIES last update May 1995 name:CYPERMETHRIN CASRN: 52315-07-8 molecular formula: C22H19CL2NO3 molecular weight : 416.3 physical state : L (L=liquid; G=gas; S=solid) reference: 9FMCC3 _________________________________________________________________________ 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): - Melting point(deg C): 60 - 80 M 9FMCC3 Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): 0.384* 25 9 M 9FMCC3 STABLE* 20 5,7 M 9FMCC3 Photolysis (per day): 0.0042* SOIL 25 7.3 M 9FMCC3 0.0123* WATER 25 M 9FMCC3 Vapor pressure (mPa): 4.1E-04* 20 M 9FMCC3 5.3E-3 70 H 9ACHB2 1983 ED. 1.9E-4 20 M 9FMCC3 Water solubility (ppm): -temp- -source- -reference- 4.1E4 (pH7) 25 M 9FMCC3 0.004* (pH7.1) 20 M 8ICIAG 03/01/90 0.0017 (pH5.1) 20 M 8ICIAG 03/01/90 Organic solubility (ppm): >5.0E+5* ACETONE 25 M 9FMCC3 >5.0E+5* METHANOL 25 M 9FMCC3 3.4E+5* ETHANOL 20 H 9PMED8,8TH ED.,p.214,1987 7.0E+4* HEXANE 20 M 9FMCC3 Henrys law (Pa m3/mol): 0.0426* 20 M 9FMCC3 Octanol/water partitioning (log Kow): 6.60* 25 M 9FMCC3 Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH reference LOAMY SAND 2000 1.6E5 2.1 5.4 9FMCC3 SANDY LOAM 166 8.4E4 3.4 6.5 9FMCC3 SILT LOAM 257 2.2E4 2.0 5.6 9FMCC3 LOAMY SAND 3050 3.4E4 15.6 4.7 9FMCC3 LOAM 174 5.8E3 5.2 7.1 9FMCC3 6.1E4* Field Dissipation halflife(days): value test area pH source reference 35 H 9ACHB2 1983 ED. 49-82(AV.63) M 9FMCC3 15 M 8ICIAG 7-20 SOIL 80-81 M 9FMCC3 <10 SOIL 79 M 9FMCC3 27(7-82)* Halflife in soil: Soiltype aerobic anaerobic source reference VARIOUS 6-20 <14 M 9FMCC3 36* 36* M 9FMCC3 SANDY LOAM 60 53-63 M 9FMCC3 Comments: