ARS PESTICIDE PROPERTIES last update May 1995 name:HYDRAMETHYLNON CASRN: 67485-29-4 molecular formula: C25H24F6N4 molecular weight : 494.5 physical state : S (L=liquid; G=gas; S=solid) reference: _________________________________________________________________________ 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): 185 - 190 H 9ACHB2 Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): 0.024* 4.9 H 9PME10 0.066* 7.03 H 9PME10 0.060 8.87 H 9PME10 Photolysis (per day): 16.6 H 9PME10 Vapor pressure (mPa): .0027* 25 H 9ACHB2 Water solubility (ppm): -temp- -source- -reference- 0.006* 25 H 9PMED8 Organic solubility (ppm): Henrys law (Pa m3/mol): 0.223* 25 H 9ACHB2 Octanol/water partitioning (log Kow): 2.31* H 9PME10 Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH reference 7.3E+5* CMSHAF 10:833-845,1981 Field Dissipation halflife(days): value test area pH source reference 7-28 H 9ACHB2 18(7-28)* Halflife in soil: Soiltype aerobic anaerobic source reference Comments: