ARS PESTICIDE PROPERTIES last update May 1995


name:DIMETHIPIN                                CASRN: 55290-64-7

molecular formula: C6H10O4S2
molecular weight : 210.3
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):
167    -    169                                  M     6UNIRO

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
6.9E-5*                          25     3        M     6UNIRO
1.5E-5*                          25     6        M     6UNIRO
7.9E-4*                          25     9        M     6UNIRO

Photolysis (per day):
9.07E-3*             SOIL        25              M     6UNIRO
0.017*               WATER       25     5-9      M     6UNIRO

Vapor pressure (mPa):
0.051*                           25              M     6UNIRO

Water solubility (ppm):        -temp-       -source-   -reference-
4600*                            25              M     6UNIRO
3000                             25              H     9ACHB2

Organic solubility (ppm):
1.8E+5*   ACETONITRILE           25              M     6UNIRO
11.5*     HEXANE                 25              M     6UNIRO
10.7*     METHANOL               25              M     6UNIRO
794*      OCTANOL                25              M     6UNIRO
9E+3*     TOLUENE                25              M     6UNIRO

Henrys law (Pa m3/mol):
2.3E-6*                          25              M     6UNIRO

Octanol/water partitioning (log Kow):
-0.174                                           M     6UNIRO

Acid dissociation (pKa):
10.88*                           25              M     6UNIRO



Soil sorption:
soiltype        temp.   Kd      Koc     %om   pH     reference
CLAY                    0.092   3.27    4.8   5.9    6UNIRO
SAND                    <0.01   <2      0.9   6.5    6UNIRO
SANDY LOAM              <0.01   <1      3.1   6.3    6UNRIO
LOAM                    <0.01   <1      0.8   6.7    6UNIRO
                                 3*

Field Dissipation halflife(days):
value         test area        pH   %OM      source  reference
168           GA(COTTON)                        M    6UNIRO
192           MS(COTTON)                        M    6UNIRO

Halflife in soil:
Soiltype          aerobic        anaerobic   source  reference
                   413*                         M    6UNIRO


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