ARS PESTICIDE PROPERTIES last update May 1995


name:THIABENDAZOLE                             CASRN: 148-79-8

molecular formula: C10H7N3S
molecular weight : 201.2
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):
298    -    300.6                                 M     6MERCO

Decomposition point(deg C):
       -

Heat of vaporization(deg C):


--RATE CONSTANTS--
Hydrolysis (per day):
STABLE*                          RT              H     9PMED8

Photolysis (per day):
STABLE*                          RT              H     9PMED8

Vapor pressure (mPa):
5.32E-4                          25              M     6MERCO

Water solubility (ppm):       -temp-         -source- -reference-
30*                             25     5         M     EESADV
28                              25     7,9       M     9ACHB2
<50                             25               H     9ACHB2
10000(pH2)*                     25               H     9ACHB2

Organic solubility (ppm):
7.9E+3*   ETHANOL               25               M           9PMED8
2.1E+3*   ETHYL ACETATE         25               H           9PMED8
2.3E+5*   BENZENE               RT               H           9PMED8
8E+4*     CHLOROFORM            RT               H           9PMED8
3.9E+4*   DIME-FORMAMIDE        RT               H           9PMED8
8E+4*     DIME SULFOXIDE        RT               H           9PMED8
9.3E+3*   METHANOL              RT               H           9PMED8

Henrys law (Pa m3/mol):
3.8E-7                                           M           6MERCO

Octanol/water partitioning (log Kow):

Acid dissociation (pKa):
4.73                                             M           6MERCO
12.00                                            M           6MERCO

Soil sorption:
soiltype      temp.   Kd     Koc    %om   pH  source  reference
                             1720               R     EESADV
                             >510               R     EESADV
                              29                E     JAFCAU 29:1050-1059,1981
                              3500              E     JAFCAU 29:1050-1059,1981
                              1070              R     7UFLCO
                              2500*

Field Dissipation halflife(days):
value             test area         pH   %om  source  reference
1100(833-1444)*                                 M     6MERCO

Halflife in soil:
Soiltype         aerobic        anaerobic     source  reference
                 640(547-780)*   stable         M     6MERCO

Comments:
SOIL SORPTION KOC VALUE=2500(1070-3715)