ARS PESTICIDE PROPERTIES last update May 1995 name:CHLORFENAC SODIUM SALT CASRN: 2439-00-1 molecular formula: C8H4CL3NAO2 molecular weight : 261.5 physical state : S (L=liquid; G=gas; S=solid) reference: 9ACHB2,7TH ED.,1977 _________________________________________________________________________ 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): 157 - 160 H 9ACHB2 7TH ED.,1977 Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): Photolysis (per day): Vapor pressure (mPa): NONVOLAT* H 9ACHB2 7TH ED.,1977 Water solubility (ppm): -temp- -source- -reference- >5E05* H 9ACHB2 Organic solubility (ppm): Henrys law (Pa m3/mol): Octanol/water partitioning (log Kow): Acid dissociation (pKa): 3.70* 25 E ESTHAG 3:1186-1188,1969 Soil sorption: soiltype temp. Kd Koc %om pH source reference 53* E CMSHAF 10:833-845,1981 Field Dissipation halflife(days): value test area pH %om source reference 158(90-240)* 120-240 H 9HERBH H 9ACHB2 1983 ED. 90-180 H 9ACHB2 Halflife in soil: Soiltype aerobic anaerobic source reference Comments: