ARS PESTICIDE PROPERTIES last update May 1995


name:TEMEPHOS                                  CASRN: 3383-96-8

molecular formula: C16H20O6P2S3
molecular weight : 422.46
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9ACHB2

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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.
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-value-            -medium-   -temp-  -pH-   -source-    -reference-


Boiling point(deg C):
       -

Melting point(deg C):
30     -   30.5                                  H     9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
STABLE*                         25     5-7       H     9PMED8

Photolysis (per day):

Vapor pressure (mPa):


Water solubility (ppm):       -temp-         -source-  -reference-
0.03                            25                H     9PME10

Organic solubility (ppm):
SOLUBLE*   ACETONE,CCL4,ETHER                     H     9PMED8
SOLUBLE*   1,2-DICHLOROETHANE                     H     9PMED8
SOLUBLE*   TOLUENE,SM.AL,KETS.                    H     9PMED8

Henrys law (Pa m3/mol):

Octanol/water partitioning (log Kow):
4.90                                              H     9PME10
Acid dissociation (pKa):


Soil sorption:
soiltype        temp.   Kd      Koc      %om     pH       reference
                                1070*                     9AMCY1

Field Dissipation halflife(days):
value           test area        pH          source       reference

Halflife in soil:
Soiltype            aerobic      anaerobic   source       reference

Comments:
SORPTION COEF. VALUE 1070(RANGE 1070-3715)