ARS PESTICIDE PROPERTIES last update May 1995
name:CHLORIMURON ET CASRN: 90982-32-4
molecular formula: C15H15CLN4O6S molecular weight : 414.8 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): 180 - 182 M 9DUPON
Decomposition point(deg C): -
Heat of vaporization(deg C):
--RATE CONSTANTS--
Hydrolysis (per day): 0.041* 25 5 M 9DUPON <<<0.2* 25 7-9 M 9DUPON
Photolysis (per day): 0.0194 SOIL 25 5.8 M 9DUPON,1999 0.026* WATER 25 7 M 9DUPON 0.058 WATER 25 5 M 9DUPON 0.019 WATER 25 9 M 9DUPON
Vapor pressure (mPa): 5.33E-7* 25 M 9DUPON,1999
Water solubility (ppm): -temp- -pH- -source- -reference- 1200* 25 7 M 9DUPON 9 25 5 M 9DUPON
Organic solubility (ppm):
Henrys law (Pa m3/mol): 1.84E-10* 25 7 M 9DUPON,1999 2.46E-8 25 5 M 9DUPON,1999
Octanol/water partitioning (log Kow): 0.36 25 7 M 9DUPON
Acid dissociation (pKa): 4.2 25 M 9DUPON
Soil sorption: soiltype temp. Kd Koc %om pH source reference SANDY LM(MD) 25 0.43 35 2.1 6.5 M 9DUPON SILT LM(IL) 25 3.2 128 4.3 5.4 M 9DUPON SILT LM(DE) 25 7.4 170 7.5 5.2 M 9DUPON SANDY LM(DE) 25 0.19 30 1.1 6.6 M 9DUPON
Field Dissipation halflife(days): value test area pH %OM source reference 21(14-42)* 40 M 9DUPON 14-28 NEWARK(DE) 6.4 2.8 M 9DUPON 28-42 ROCHELLE(IL) 6.7 6.7 M 9DUPON <14 STONEVILLE(MS) 6.4 1.4 M 9DUPON <14 FAYETTEVILLE(NC) 5.9 M 9DUPON
Halflife in soil: Soiltype aerobic anaerobic source reference SANDY LOAM 53 M 9DUPON,1999 SILT LOAM 53 M 9DUPON,1999
Comments: HENRYS LAW VALUE AT PH7; OCTANOL WATER=PH7; AEROBIC=PH5; SOIL SORPTION KOC=91(35-170)