ARS PESTICIDE PROPERTIES last update May 1995 name:DISULFOTON CASRN: 298-04-4 molecular formula: C8H19O2PS3 molecular weight : 274.4 physical state : L (L=liquid; G=gas; S=solid) reference: 9MILES _________________________________________________________________________ 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): 62 - 0.01mmHg H 9PMED8,8TH ED.,p.320,1987 Melting point(deg C): 108 - R 9HRLCP Decomposition point(deg C): - Heat of vaporization(deg C): --RATE CONSTANTS-- Hydrolysis (per day): 0.023* 40 4 M 6MILES 0.0299* 40 7 M 6MILES 0.0305* 40 9 M 6MILES Photolysis (per day): 0.289* SOIL 2-37 OD M 6MILES 0.179* WATER 13-30 OD M 6MILES Vapor pressure (mPa): 7.2* 20 M 6MILES 24 20 H 9PMED8,8TH ED.,p.320,1987 20 NR R 9HRLCP 45 NR E ACSMC8,V.255,p.205,1984 Water solubility (ppm): -temp- -source- -reference- 12.0* 20 M 6MILES 25.0 22 H 9PMED8,8TH ED.,p.320,1987 16.3 19.5 E JPFCD2,VB14(6):627,1979 23 R 8SOCOS Organic solubility (ppm): Henrys law (Pa m3/mol): 2.2E-01 20 R 9HRLCP 1.6E-01 20 M 6MILES 0.16* 20 Octanol/water partitioning (log Kow): 4.02 NR R 9HRLCP(BOWMAN&SANS,1983) 3.95 20 M 6MILES 4.0* 20 Acid dissociation (pKa): Soil sorption: soiltype temp. Kd Koc %om pH source reference 1778 R EESADV, 4:29,1980 741 R EESADV, 4:29,1980 794 E JPFCD2, VB22(1):67,1987 1600 E JEFQAA 16:422-428,1987 1780 R EESADV 740 R EESADV 676 C 8CREAM 3000 C 8CREAM 4070 E JPFCD2 22:55-69,1987 1660 R 8INSFO SILT LOAM 25 6.85 449** 2.9 5.9 M 6MILES SAND 25 4.67 888** 1.0 4.3 M 6MILES CLAY LM 25 4.47 386** 2.2 6.4 M 6MILES SANDY LOAM 25 9.66 483** 3.8 6.8 M 6MILES 1345* Field Dissipation halflife(days): value test area pH %OM source reference 40 SOIL 11-63 M 6MILES 28 SOIL 11-63 M 6MILES 90 SOIL 4-65 M 6MILES 60 SOIL 4-65 M 6MILES 5 E SCSFAD 44:1-8,1985 70 R 8INSFO 2.01 CA(CHULAR)LMY SND 7.3 M 6MILES 3.70 CA(FRESNO)LMY SND 7.8 M 6MILES 37(2-90)* Halflife in soil: Soiltype aerobic anaerobic source reference SANDY LOAM 2.4 M 6MILES SANDY LOAM 1.9 M 6MILES 2.2* Comments: SOIL SORPTION KOC VALUES WITH A DOUBLE ASTERISK WERE CALCULATED USING A CONVERSION FACTOR OF 1.9(%OM=1.9%OC) RATHER THAN 1.72. SELECTED KOC= 1345(349-4070)