ARS PESTICIDE PROPERTIES last update May 1995


name:OXYDEMETON-ME                             CASRN: 301-12-2

molecular formula: C6H15O4PS2
molecular weight : 246.29
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):
106    -           0.01mmHg                      H     9ACHB2,2ND ED.,1987

Melting point(deg C):
-10    -                                         H     9PMED8,8TH ED.,p.625,1987

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
0.00740*                         25     5        M     6MILES
0.0175*                          25     7        M     6MILES
0.283*                           25     9        M     6MILES

Photolysis (per day):
0.011*               SOIL        9-34 OD         M     6MILES
0.005*               WATER       23              M     6MILES

Vapor pressure (mPa):
3.8*                             20              M     6MILES



Water solubility (ppm):       -temp-        -source-  -reference-
MISCIBLE                         20              M     6MILES
1E+6*                                            H     9ACHB2 7TH ED., 1977

Organic solubility (ppm):
1.0E+4*   2-PROPANOL             20              M     6MILES
1.0E+4*   DICHLOROMETHANE        20              M     6MILES
1.0E+4*   XYLENE                 20              M     6MILES

Henrys law (Pa m3/mol):
<2.5E-06*                        20              M     6MILES

Octanol/water partitioning (log Kow):

Acid dissociation (pKa):


Soil sorption:
soiltype        temp.   Kd      Koc      %om   pH      reference


Field Dissipation halflife(days):
value          test area        pH          source     reference
2.2        CA(CHUALAR) LMY SND  7.3           M        6MILES
1.6        CA(FRESNO) LMY SND   7.8           M        6MILES
4.6(1.6-10)*

Halflife in soil:
Soiltype            aerobic      anaerobic   source    reference
SANDY LOAM           0.4*                     M        6MILES


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