ARS PESTICIDE PROPERTIES last update May 1995


name:OXADIAZON                                 CASRN: 19666-30-9

molecular formula: C15H18CL2N2O3
molecular weight : 345.23
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9RHPOU

_________________________________________________________________________
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):
88     -     90                                  H     9MERCK,10TH ED,P.991

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
0.00560*                         25     5        M     9RHPOU

Photolysis (per day):
40.8*                WATER                       M     9RHPOU
0.00305*             SOIL                        M     9RHPOU

Vapor pressure (mPa):
<0.13                            20              H     9ACHB2 1983 ED.
0.13                                             H     9HERBH
0.015*                           22              M     9RHPOU


Water solubility (ppm):        -temp-        -source-  -reference-
0.7*                             25              M     9RHPOU
7.0E-01                          20              H     9ACHB2,2ND ED.,1987

Organic solubility (ppm):
2.0E+5*   CYCLOHEXANE            20              H     9ACHB2,2ND ED.,1987
6.0E+5*   ACETOPHENONE           20              H     9PMED8,8TH ED.,p.617,1987
6.0E+5*   ANISOLE                20              H     9PMED8,8TH ED.,p.617,1987
4.6E+5*   ACETONE                25              M     9RHPOU
4.1E+5*   ACETONITRILE           25              M     9RHPOU
5.8E+4*   HEXANE                 25              M     9RHPOU
1E+6*     BENZ.,CHCL3,TOLUENE
1E+5*     METHANEOL,ETHANOL

Henrys law (Pa m3/mol):
7.2E-03*                         25              M     9RHPOU

Octanol/water partitioning (log Kow):
4.70*                            25              M     9RHPOU
4.09                                             E     ESTHAG, 22(3):272,1988

Acid dissociation (pKa):


Soil sorption:
soiltype       temp.   Kd    Koc    %om   pH  source  reference
                             3241                R    EESADV, 4:30,1980
                             5300                R    EESADV, 4:30,1980
                             3241                E    JAFCAU 29:1050-1059,1981
                             1600                C    8CREAM
                             3345*

Field Dissipation halflife(days):
value           test area        pH    %OM    source  reference
90-180                                           H    9ACHB2 1983 ED.
ca 50           SOIL-SOYBEAN(18                  M    9RHPOU
30              SOIL-CITRUS(6)                   M    9RHPOU
135             89 CA ORNAM.                     M    9RHPOU
116               89 NC ORNAM.                   M    9RHPOU
60-90             SOIL - APPLE(7)                M    9RHPOU
<45               SOIL - TURF(6)                 M    9RHPOU
15-20             SOIL-PEANUT(20)                M    9RHPOU
75(30-180)*

Halflife in soil:
Soiltype           aerobic      anaerobic     source  reference
SANDY LOAM           180*       180              M    9RHPOU


Comments:
SOIL SORPTION KOC VALUE=3345(1600-5300)