ARS PESTICIDE PROPERTIES last update May 1995


name:LINURON                                   CASRN: 330-55-2

molecular formula: C9H10CL2N2O2
molecular weight : 249.1
physical state   : S
(L=liquid; G=gas; S=solid)
reference:

_________________________________________________________________________
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):
93     -     94                                  H        9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
0.00061*                       25     5,7,9       M       9DUPON
0.00086                        25     5           M       9DUPON
0.00051                        25     9           M       9DUPON

Photolysis (per day):
0.0091                SOIL     25     4.5         M       9DUPON
0.014*                WATER    25     5           M       9DUPON

Vapor pressure (mPa):
 2.0                           24                 H       9ACHB2 1983 ED.
 1.5                           20                 R       9HRLCP
 2.3                            0                 M       8HOECH
 2.0                           25                 M       9DUPON
0.19*                          25                 M       9DUPON


Water solubility (ppm):       -temp-    -pH-   -source-   -reference-
55                                                M       8HOECH
81                             25                 H       9FACHB 1990
75*                            25                 M       9DUPON

Organic solubility (ppm):


Henrys law (Pa m3/mol):
6.2E-4*                        25                 M       9DUPON
0.0044            SOIL         25       4.3       M       9DUPON

Octanol/water partitioning (log Kow):
3.0*                           25                 M       9DUPON

Acid dissociation (pKa):


Soil sorption:
soiltype     temp.   Kd     Koc     %om    pH  source   reference
                            863                   E     JEFQAA 16:4220428,1987
                            400                   H     9HERBH
                            93                    R     EESADV
                            820                   R     EESADV
                            410                   R     EESADV
                            603                   C     8CREAM
                            393                   M     8HOECH
                            718                   R     8INSFO
                            653                   C     8SWAMD
                            820                   C     8SWAMD
                            863                   C     8SWAMD
                            267                   C     8SWAMD
                            229                   C     8SWAMD
                            496*
SNDY LM(DE)   25     2.7    422     1.1    6.6    M     9DUPON
SNDY LM(NC)   25     5.0    410     2.1    6.5    M     9DUPON
SILT LM(FL)   25     7.7    308     4.3    5.4    M     9DUPON
SILT LM(DE)   25     7.2    165     7.5    5.2    M     9DUPON

Field Dissipation halflife(days):
value         test area        pH   %OM         source  reference
30                                                H     9ACHB2 1983 ED.
75                                                E     JEVQAA 16:422-428,1987
60-150                                            H     9HERBH
230                                               R     9EINSP PP.23-67
25-178                                            C     8CREAM
75                                                M     8HOECH
60                                                M     9DUPON
82(30-230)*
60            SILT LM(DE)      6.4  2.7           M     9DUPON
30            SILT LM(DE)      6.4  2.7           M     9DUPON
30            SILT LM(MS)      5.5  1.3           M     9DUPON

Halflife in soil:
Soiltype           aerobic      anaerobic   source    reference
                     81*


Comments:
SOIL SORPTION KOC VALUE=496(93-863); AEROBIC=81(49-133)
AT PH6.5 25 DEGREES C.