ARS PESTICIDE PROPERTIES last update May 1995


name:TERBUFOS                                  CASRN: 13071-79-9

molecular formula: C9H21O2PS3
molecular weight : 288.43
physical state   : L
(L=liquid; G=gas; S=solid)
reference: 9PBIFC2,697,1973

_________________________________________________________________________
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):
69     -             0.01mmHg                    R     9PBIFC

Melting point(deg C):
-29.2  -                                         R     9PBIFC

Decomposition point(deg C):
120    -                                         R     9PBIFC

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
0.21                             20   5.5-8.7    E   JPFCD2,B(17)5:447,1982
0.37                             25   4.5-8.0    E   JPFCD2,B(17)5:487,1982

Photolysis (per day):
0.95                 WATER       25              M     9AMCY1

Vapor pressure (mPa):
34.6                             25              H     9ACHB2 1983 ED.
42.0*                            25              M     9AMCY1


Water solubility (ppm):     -temp-           -source- -reference-
4.2                                              E     JPFCD2 22:55-69, 1987
4.5*                          25                 M     9AMCY1
5.07                          24                 E     JAFCAU,27(3):559,1979
5.5                           20                 E     JPFCD2,B14(6):625,1979
4.9                           25                 M     9AMCY1
5.4                           25                 M     9AMCY1
5.6                           25                 M     9AMCY1
4.5                           20                 M     9AMCY1

Organic solubility (ppm):
ca. 3E05    AROMATIC HYDROCARBONS                H     9PME10
            CHLORINATED HYDROCARBONS             H     9PME10
            ALCOHOLS                             H     9PME10
            ACETONE                              H     9PME10

Henrys law (Pa m3/mol):
2.7*                          25                 M     9AMCY1

Octanol/water partitioning (log Kow):
4.5                                              E    JPFCD2,B17(5):447,1979
3.7                                              E    JAFCAU 27(3):557,1979
4.7*                                             M    9AMCY1

Acid dissociation (pKa):


Soil sorption:
soiltype        temp.   Kd      Koc      %om   pH     reference
                                1100                 EESADV
                                1000                 8GLEAM
                                580                  JPFCD2 22:55-69,1987
LOAMY SAND              11.4    1069    1.84  6.83   JAFCAU,27(3):557,1979
LOAMY SAND              3.34    655     0.88  7.30   JAFCAU,27(3):557,1979
LOAM                    8.3     314     4.56  5.00   JAFCAU,27(3):557,1979
SILT LOAM               21.3    562     6.55  7.30   JAFCAU,27(3):557,1979
LOAM                    52.7    288     31.65 6.98   JAFCAU,27(3):557,1979
                                650*

Field Dissipation halflife(days):
value             test area        pH       source   reference
4-23              SOIL IA                      M     9AMCY1
7-30              SOIL NE                      M     9AMCY1
10-18             SOIL IL                      M     9AMCY1
12(5-30)*

Halflife in soil:
Soiltype           aerobic      anaerobic   source    reference
SILT LOAM           5*                         M      9AMCY1


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