ARS PESTICIDE PROPERTIES last update May 1995


name:TEBUTHIURON                               CASRN: 34014-18-1

molecular formula: C9H16N4OS
molecular weight : 228.32
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):
161.5  -    164                                  H     9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
(no hydrolysis in 64 days)      51    3,6,9      M     6DOWCH

Photolysis (per day):
<0.023*             WATER       25               M     6DOWCH
0.017               SOIL        25               M     6DOWCH

Vapor pressure (mPa):
0.27                            20               H     9HERBH
                                                 H     9ACHB2 1983 ED.
                                                 M     7LILLY
0.149                                            M     6DOWCH

Water solubility (ppm):     -temp-          -source-   -reference-
2300                          25                 H     9ACHB2 1983 ED.
2500                          25                 H     9HERBH
                                                 M     7LILLY

Organic solubility (ppm):
7E04*     ACETONE             25                 H     9PMED8
6E04*     ACETONITRILE        25                 H     9PMED8
6.1E03*   HEXANE              25                 H     9PMED8
1.7E05*   METHANOL            25                 H     9PMED8
6E04*     2-METHOXY ETHANOL   25                 H     9PMED8

Henrys law (Pa m3/mol):
1.31E-05*                                        M     6DOWCH

Octanol/water partitioning (log Kow):
1.79                                             M     6DOWCH

Acid dissociation (pKa):


Soil sorption:
soiltype      temp.   Kd    Koc    %om    pH  source   reference
                            249                 P      8EPAHO
                            620                 R      EESADV
                            61                  R      EESADV
                            80                  M      7LILLY
                            4                   P      8EPAHO
                            13                  P      8EPAHO
                            60                  P      8EPAHO
                            130*
SAND           25     0.11  38     0.5    7.7   M      6DOWCH
SANDY LOAM     25     0.62  77     1.4    5.7   M      6DOWCH
LOAM           25     0.82  79     1.8    6.5   M      6DOWCH
CLAY LOAM      25     1.82  157    2.0    6.9   M      6DOWCH

Field Dissipation halflife(days):
value             test area        pH        source    reference
360-450                                         H      9HERBH
13-100                                          C      8CREAM
360*                                            M      7LILLY

Halflife in soil:
Soiltype            aerobic      anaerobic   source    reference
SANDY LOAM          1050*                       M      6DOWCH


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