ARS PESTICIDE PROPERTIES last update May 1995


name:TERBUTRYN                                 CASRN: 886-50-0

molecular formula: C10H19N5S
molecular weight : 241.36
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9CIBAG

_________________________________________________________________________
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):
154    -    160   0.06mmHg                       H     9PME10

Melting point(deg C):
104    -    105                                  E     9ACHB2,2ND ED.,1987

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
STABLE*                          NR    5-9       M     9CIBAG

Photolysis (per day):
0.161*               SOIL        NR    7.5       M     9CIBAG
2.24                 WATER       25              M     9CIBAG

Vapor pressure (mPa):
0.28*                            25              M     9CIBAG
1.28E-1                          20              H     9ACHB2,2ND ED.,1987
.128E+1                          20              H     9HERBH,5TH ED.,p.458,1983


Water solubility (ppm):       -temp-        -source-   -reference-
22*                              22              M     9CIBAG
25                               20              H     9PMED8,8TH ED.,p.780,1987
25                               20              E     PSSCBG, 8:343,1977

Organic solubility (ppm):
1.3E+5*   N-OCTANOL              20              H     9PMED8,8TH ED.,p.780,1987
2.8E+5*   ACETONE                20              H     9ACHB2,2ND ED.,1987
9.0E+3*   HEXANE                 20              H     9ACHB2,2ND ED.,1987
3.0E+5*   DICHLOROMETHANE        20              H     9ACHB2,2ND ED.,1987
2.8E+5*   METHANOL               20              H     9ACHB2,2ND ED.,1987
4.5E+4*   TOLUENE                20              H     9ACHB2,2ND ED.,1987

Henrys law (Pa m3/mol):
3.0E-3                           25              M     9CIBAG
0.0031*                          25

Octanol/water partitioning (log Kow):
3.36                             25              M     9CIBAG
3.72                             20              E     PSSCBG, 12:222,1981
3.74                             25              E     PSSCBG, 12:222,1981
3.65*                            25

Acid dissociation (pKa):
4.07*                                            E     ADCSAJ, 111:73,1972



Soil sorption:
soiltype        temp.   Kd       Koc     %om   pH     reference
                                 708                  EESADV, 4:31,1980
                                 700                  EESADV
                                 740                  EESADV
                                 2190                 8EPAGR
                                 3790                 8EPAGR
SAND                    49.3     2735    3.1   5.1    9CIBAG
LOAMY SAND              2.84     1628    0.3   7.4    9CIBAG
SILT LOAM               14.1     1617    1.5   6.7    9CIBAG
CLAY LOAM               183      11660   2.7          9RHPOU
                                 2863*

Field Dissipation halflife(days):
value         test area        pH          source     reference
7-14                                          H       9HERBH
17            TX                              P       8EPAGR
358           NE                              P       8EPAGR
84                                            P       8EPAGR
17-56         TX                              M       9CIBAG
157-358       NB                              M       9CIBAG
127(17-358)*


Halflife in soil:
Soiltype            aerobic      anaerobic   source   reference
SANDY LOAM(pH7.5)    38*         140           M      9CIBAG
WATER                            8             M      9CIBAG


Comments:
NO LONGER SOLD BY CIBA.