ARS PESTICIDE PROPERTIES last update May 1995 name:DICROTOPHOS CASRN: 141-66-2 molecular formula: C8H16NO5P molecular weight : 237.2 physical state : L (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): 130 - 0.1mmHg H 9PME10 400 760mmHg H 9PME10 Melting point(deg C): - Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): .0059* 25 5 M 9DUPON .0096* 25 7 M 9DUPON .025* 25 9 M 9DUPON Photolysis (per day): STABLE* SOIL 25 5.7 M 9DUPON 0.014* WATER 25 7 M 9DUPON Vapor pressure (mPa): 21.3* 25 M 9DUPON 9.3 20 H 9ACHB2 Water solubility (ppm): -temp- -source- -reference- MISC.* 25 M 9DUPON Organic solubility (ppm): MISCIBLE* ACETONE H 9PMED8 MISCIBLE* METHANOL H 9PMED8 MISCIBLE* 2-PROPANOL H 9PMED8 Henrys law (Pa m3/mol): 5.1E-6* 25 M 9DUPON Octanol/water partitioning (log Kow): -0.5* 21 pH7 M 9DUPON Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH source reference 20 C 8GLEAM 64* SAND(GA) 25 0.1 16 1.1 6.7 M 9DUPON SANDY LOAM(CA) 25 0.4 53 1.3 6.4 M 9DUPON SILTY LOAM(IL) 25 1.0 43 4.0 5.7 M 9DUPON CLAY LOAM(MS) 25 3.6 188 3.3 5.9 M 9DUPON Field Dissipation halflife(days): value test area pH %OM source reference 20 M 9DUPON 8(1-20)* <1 FT.VALLEY(GA) 6.8 1.2 M 9DUPON 2 GREENVILLE(MS) 6.2 0.6 M 9DUPON Halflife in soil: Soiltype aerobic anaerobic source reference SANDY LOAM(CA) 3* 7 M 9DUPON Comments: SOIL SORPTION KOC VALUE 64(16-188); AEROBIC 3=PH5,7; ANAEROBIC 7=PH5,7