ARS PESTICIDE PROPERTIES last update May 1995


name:SIDURON                                   CASRN: 1982-49-6

molecular formula: C14H20N2O
molecular weight : 232.3
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9ACHB2

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


Boiling point(deg C):
       -

Melting point(deg C):
133    -    141                                   M       9DUPON

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--


Hydrolysis (per day):
<<0.023*                         25    5,7,9      M       9DUPON

Photolysis (per day):
<<0.014*             AIR         25               M       9DUPON

Vapor pressure (mPa):
5.3E-04*                         25               M       9DUPON


Water solubility (ppm):       -temp-           -source-   -reference-
1800*                            22                       9DUPON

Organic solubility (ppm):
>1E05*    DICHLOROMETHANE        25              H     9PMED8
>1E05*    DIMETHYLACETAMIDE      25              H     9PMED8
>1E05*    DIMETHYLFORMAMIDE      25              H     9PMED8
>1E05*    355,TRIMECYCHEX2ENON   25              H     9PMED8

Henrys law (Pa m3/mol):
6.9E-06*                         25              M     9DUPON

Octanol/water partitioning (log Kow):
2.7*                             25     5-7      M     9DUPON

Acid dissociation (pKa):


Soil sorption:
soiltype        temp.   Kd      Koc      %om   pH     reference
                                 420*                 9DUPON
                                 224                  8CREAM
                                 CA.420               9DUPON

Field Dissipation halflife(days):
value           test area        pH        source     reference
120                                          M        9DUPON
128(120-150)*   NEWARK(DE)

Halflife in soil:
Soiltype          aerobic      anaerobic   source     reference

Comments:
OCTANOL WATER VALUE=2.7 PH5.7
FIELD DISSIPATIO=128(120-150) FOR SILT LOAM