ARS PESTICIDE PROPERTIES last update May 1995 name:IMAZAPYR ACID CASRN: 81334-34-1 molecular formula: C13H15N3O3 molecular weight : 261.3 physical state : S (L=liquid; G=gas; S=solid) reference:9ACHB2 _________________________________________________________________________ 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): 169 - 173 H 9ACHB2 Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): STABLE* 5-9 H 9PME10 Photolysis (per day): 0.116* WATER 5-9 H 9PME10 Vapor pressure (mPa): <0.013E* 60 H 9PME10 Water solubility (ppm): -temp- -source- -reference- 1.5E04* H 9HERBH 6TH ED.,1989 1.13E4 25 H 9PME10 1.1E4* 25 M 9AMCY1 Organic solubility (ppm): Henrys law (Pa m3/mol): 3.0E-7* H 9PME10 Octanol/water partitioning (log Kow): 0.114* 22 H 9PME10 Acid dissociation (pKa): 1.9 H 9PME10 3.6 H 9PME10 Soil sorption: soiltype temp. Kd Koc %om pH reference 100(EST)* W Field Dissipation halflife(days): value test area pH source reference 90-712 H 9HERBH 6TH ED.,1989 H 9ACHB2 90* M 9AMCY1 Halflife in soil: Soiltype aerobic anaerobic source reference Comments: