ARS PESTICIDE PROPERTIES last update May 1995 name:MONOCROTOPHOS CASRN: 6923-22-4 molecular formula: C7H14NO5P molecular weight : 223.2 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): 125 - 0.0005mmHg H 9PME10 Melting point(deg C): 54 - 55 H 9ACHB2 Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): 0.0072* 20 5 H 9PMED8 0.0105* 20 7 H 9PMED8 0.0408* 20 9 H 9PMED8 Photolysis (per day): Vapor pressure (mPa): 0.29* 20 H 9PME10 0.98 20 H 9PME10 Water solubility (ppm): -temp- -source- -reference- 1E06* 20 H 9ACHB2 1983 ED. Organic solubility (ppm): 7E05* ACETONE 20 H 9PMED8 8E05* DICHLOROMETHANE 20 H 9PMED8 1E06* METHANOL 20 H 9PMED8 2.5E05* OCTAN-1-OL 20 H 9PMED8 6E04* TOLUENE 20 H 9PMED8 Henrys law (Pa m3/mol): 6.5E-8* 20 H 9PMED8 Octanol/water partitioning (log Kow): -0.22 H 9PME10 Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH reference 1* CMSHAF 10:833-845,1981 Field Dissipation halflife(days): value test area pH source reference 13-16 R 8FULLE 30* P 6EPAFH Halflife in soil: Soiltype aerobic anaerobic source reference 1-5 H 9PME10 Comments: