ARS PESTICIDE PROPERTIES DATABASE last updated Jan, 2002


name: BENTAZON SODIUM SALT                      CASRN: 50723-80-3


SELECTED VALUES FOR MODELING PURPOSES (from Hornsby, et al., 1996)

WATER SOLUBILITY (mg/L): 2300000
FIELD HALF-LIFE (days): 20
SOIL ORGANIC CARBON SORPTION (Koc, mL/g): 34 {2}
VAPOR PRESSURE (mm Hg): 0
pKa: --


PUBLISHED AND MANUFACTURER VALUES AND SOURCES

molecular formula: C10H11N2O3S.Na
molecular weight : 284.3
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9ACHB3

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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.
_________________________________________________________________________

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


Boiling point(deg C):
       -

Melting point(deg C):
137    -    139     parent                       H     9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):

Photolysis (per day):

Vapor pressure (mPa):
 <0.001 (parent)                 20              H     9ACHB2


Water solubility (ppm):        -temp-        -source- -reference-
2.3E06*                                          P     6EPAPF
500 (parent)                     20              R     EESADV

Organic solubility (ppm):

Henrys law (Pa m3/mol):

Octanol/water partitioning (log Kow):

Acid dissociation (pKa):


Soil sorption:
soiltype        temp.   Kd      Koc      %om   pH     reference
                                34 parent             CMSHAF 10:833-845,1981
                                35*                   8GLEAM

Field Dissipation halflife(days):
value           test area       pH          source    reference
27(7-98)*
<30                                            R      8FULLE
10                                             H      9HERBH
14-98                                          P      8EPAGR
7                                              P      8EPAGR
30                                             P      8EPAGR

Halflife in soil:
Soiltype           aerobic      anaerobic   source    reference

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