ARS PESTICIDE PROPERTIES DATABASE last updated May 1995 name: PIRIMICARB CASRN: 23103-98-3 molecular formula: C11H18N4O2 molecular weight: 238.3 physical state: S (L=liquid; G=gas; S=solid) reference: 9PMED9 __________________________________________________________________________ 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): 90.5 H 9PME10 Decomposition point (deg C): Heat of vaporization (deg C): --RATE CONSTANTS-- Hydrolysis (per day): Photolysis (per day): >0.693 UV WATER 5,7,9 H 9PME10 Vapor pressure (mPa): 4 30 H 9PMED9 0.97* 25 H 9PME10 Water solubility (ppm): 2700 25 H 9PMED9 H 9ACHB2 1983 H 9FACHB 1992 3000* 20 7.4 H 9PME10 Organic solubility (ppm): 4000 ACETONE 25 H 9PME10 2500 ETHANOL 25 H 9PME10 2900 XYLENE 25 H 9PME10 3300 CHLOROFORM 25 H 9PME10 Henrys law (Pa m3/mol): 7.71E-5 H 9PME10 Octanol/water partitioning (log Kow): 1.7 H 9PME10 Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH reference -------- ----- -- --- --- -- --------- 23 9PMED9 CMSHAF 10: 833-846 (1981) Field dissipation halflife(days): value test area pH source reference ----- --------- -- ------ --------- 7-234 H 9PMED9 10* W Halflife in soil: soiltype aerobic anaerobic source reference -------- ------- --------- ------ --------- Comments: