ARS PESTICIDE PROPERTIES last update May 1995 name:METHAZOLE CASRN: 20354-26-1 molecular formula: C9H6CL2N2O3 molecular weight : 261.07 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): - Melting point(deg C): 123 - 124 H 9ACHB2 Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): Photolysis (per day): Vapor pressure (mPa): 1.33* 25 H 9ACHB2 <1.33 25 H 9HERBH Water solubility (ppm): -temp- -source- -reference- 1.5* 25 H 9HERBH H 9ACHB2 1983 ED. C EESADV Organic solubility (ppm): 4E+4* ACETONE 25 H 9PMED8 6.5E+3* METHANOL 25 H 9PMED8 5.5E+4* XYLENE 25 H 9PMED8 Henrys law (Pa m3/mol): 0.231* 25 H 9HERBH Octanol/water partitioning (log Kow): Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH source reference 2620 R EESADV 3500 R EESADV 3060* Field Dissipation halflife(days): value test area pH %OM source reference <30 H 9ACHB2 1983 ED. 14(3-30)* Halflife in soil: Soiltype aerobic anaerobic source reference Comments: