ARS PESTICIDE PROPERTIES last update May 1995 name:TRICLOPYR CASRN: 55335-06-3 molecular formula: C7H4CL3NO3 molecular weight : 256.48 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): 290 - H 9ACHB2 Melting point(deg C): 148 - 150 H 9ACHB2 Decomposition point(deg C): - 290 M 6DOWCH Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): STABLE* M 6DOWCH Photolysis (per day): 0.00034* SOIL 25 M 6DOWCH 2.0 WATER 25 M 6DOWCH Vapor pressure (mPa): 0.168* 25 H 9ACHB2 0.16 H 9HERBH Water solubility (ppm): -temp- -source- -reference- 435* 25 430 25 R EESADV 2.1E06 (salt) R EESADV 440 H 9ACHB2 7TH ED.,1977 H 9ACHB2 Organic solubility (ppm): 9.89E5* ACETONE H 9PMED8 2.73E4* CHLOROFORM H 9PMED8 3.07E5* n-OCTANOL H 9PMED8 1.13E5* ACETONITRILE H 9PMED8 3.2E5* N-ME PYROLLIDINONE H 9PMED8 410* HEXANE H 9PMED8 Henrys law (Pa m3/mol): 8.3E-05* 25 M 6DOWCH Octanol/water partitioning (log Kow): Acid dissociation (pKa): 2.68 H 9ACHB2 7TH ED.,1977 2.93* Soil sorption: soiltype temp. Kd Koc %om pH source reference 1.5 R EESADV 27 R EESADV 160 R EESADV 27 C 8SWAMD 68* SAND 25 0.975 134 1.256 5.0 M 6DOWCH SILT LOAM 25 0.571 85 1.152 7.7 M 6DOWCH CLAY LOAM 25 0.165 12 2.374 6.6 M 6DOWCH SANDY LOAM 25 0.733 33 3.84 7.5 M 6DOWCH Field Dissipation halflife(days): value test area pH source reference 46 H 9HERBH 30-90 H 9ACHB2 35(15-84)* 15 NOVA SCOTIA M 6DOWCH 35 BARE SOIL(CA) M 6DOWCH 36 GRASS(CA) M 6DOWCH 18-84(av.46) GA,ND,OR,TX,WV WY M 6DOWCH 26 ONTARIO M 6DOWCH 43 MS Halflife in soil: Soiltype aerobic anaerobic source reference 32* SILT LOAM 18 M 6DOWCH SILTY CLAY LM 8 M 6DOWCH SILT LOAM 69 M 6DOWCH Comments: WATER SOLUBILITY VALUE 2.1E06(AMINE) SOIL SORPTION KOC VALUE=68(12-160); AEROBIC 32=8-69