ARS PESTICIDE PROPERTIES last update May 1995 name:CLOPYRALID CASRN: 1702-17-6 molecular formula: C6H3CL2NO2 molecular weight : 192 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): 151 - 152 H 9ACHB2 Decomposition point(deg C): - Heat of vaporization(deg C): Hydrolysis (per day): STABLE* 25 5-9 M 6DOWCH Photolysis (per day): STABLE* SOIL 25 M 6DOWCH STABLE* WATER 25 M 6DOWCH Vapor pressure (mPa): 1.7* 25 M 6DOWCH H 9HERBH 6TH ED.,1989 Water solubility (ppm): -temp- -source- -reference- 1000 H 9HERBH 6TH ED.,1989 9000* 25 H 9ACHB2 Organic solubility (ppm): 2-3.4E05* ACETONE H 9PMED8 7-13E04* DICHLOROMETHANE H 9PMED8 7-13E04* AMYL ACETATE H 9PMED8 Henrys law (Pa m3/mol): 3.26E-04* 25 Octanol/water partitioning (log Kow): 1.81* M 6DOWCH 2.63* M 6DOWCH 2.55* M 6DOWCH Acid dissociation (pKa): 2.3* 25 H 9HERBH 2.0 M 6DOWCH Soil sorption: soiltype temp. Kd Koc %om pH source reference 6 M 6DOWCH 36* M 6DOWCH Field Dissipation halflife(days): value test area pH source reference 12-70 M 6DOWCH 13(10-30)* M 6DOWCH Halflife in soil: Soiltype aerobic anaerobic source reference 26* M 6DOWCH Comments: OCTANOL WATER VALUES 1.81=PH5, 2.63=PH7, 2.55=PH9; SOIL SORPTION KOC=36(13-60); AEROBIC=26(13-39) FIELD DISSIPATION CONCENTRATION DEPENDENT: conc. (ppm) ----------------------------------------- soiltype .0025 .025 .25 2.5 ----------------------------------------- SANDY LM(CECIL) 7 6 19 435 SANDY LM(TRACY) 6 6 13 250 CLAY(FARGO) 33 39 250 1650 SNDY CLY LM(YOLO) 19 18 68 640 SLTY CLY LM(BOZEMAN) 40 29 39 530