ARS PESTICIDE PROPERTIES last update May 1995 name:METALAXYL CASRN: 57837-19-1 molecular formula: C15H21NO4 molecular weight : 279.34 physical state : S (L=liquid; G=gas; S=solid) reference: 9CIBAG _________________________________________________________________________ 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): 71.8 - 72.3 H 9PMED8,8TH ED.,p.533,1987 Decomposition point(deg C): - 300 H 9PMED8 Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): STABLE* 25 5,7 M 9CIBAG 0.0079* 25 9 M 9CIBAG Photolysis (per day): STABLE* WATER 25 7 M 9CIBAG 0.05* SOIL 25 M 9CIBAG Vapor pressure (mPa): 0.75* 25 M 9CIBAG Water solubility (ppm): -temp- -source- -reference- 8400 22 H 9PME10 8400* 22 M 9CIBAG Organic solubility (ppm): 7.5E+5* DICHLOROMETHANE 20 H 9ACHB2,2ND ED.,1987 6.5E+5* METHANOL 20 H 9ACHB2,2ND ED.,1987 5.5E+5* BENZENE 20 H 9ACHB2,2ND ED.,1987 2.7E+5* ISOPROPANOL 20 H 9ACHB2,2ND ED.,1987 9.1E+3* N-HEXANE 20 H 9ACHB2,2ND ED.,1987 Henrys law (Pa m3/mol): 2.5E-5* 25 M 9CIBAG Octanol/water partitioning (log Kow): 1.5 25 M 9CIBAG 1.75* 25 H 9PME10 Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH source reference CLAY 35 8GLEAM SAND 8.012 284 4.8 5.9 M 9CIBAG LOAM 0.157 30 0.9 6.5 M 9CIBAG SANDY LOAM 1.401 200 1.2 7.6 M 9CIBAG SANDY LOAM 0.400 136 0.5 6.5 M 9CIBAG 171* Field Dissipation halflife(days): value test area pH source reference 296 MN M 9CIBAG 36 CA M 9CIBAG 27 CA M 9CIBAG 56 CA M 9CIBAG 50 CA M 9CIBAG 38 NC M 9CIBAG 39 NC M 9CIBAG 77(27-296)* Halflife in soil: Soiltype aerobic anaerobic source reference LOAMY SAND 40* 130 M 9CIBAG Comments: