ARS PESTICIDE PROPERTIES last update May 1995


name:SIMAZINE                                  CASRN: 122-34-9

molecular formula: C7H12CLN5
molecular weight : 201.66
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):
225    -    227                                  H     9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
STABLE*                          20     5-9      M     9CIBAG

Photolysis (per day):
4.5E-3               SOIL        25     7.3      M     9CIBAG
1.8E-E               WATER       25     7        M     9CIBAG

Vapor pressure (mPa):
1.2E-4                           10              M     9CIBAG
8E-04                            20              M     9CIBAG
5E-03                            30              M     9CIBAG
0.12                             50              M     9CIBAG
0.003*                           25


Water solubility (ppm):       -temp-          -source-       -reference-
3.5                           20                 H     9HERBH
84                            85                 H     9HERBH
6.2*                          22                 M     9CIBAG
5                                                C     JPFCD2 22:55-69,1987

Organic solubility (ppm):
900*      CHLOROFORM          20                 H     9PMED8
300*      ETHER               20                 H     9PMED8
400*      METHANOL            20                 H     9PMED8
2  *      LT.PETROLEUM        20                 H     9PMED8

Henrys law (Pa m3/mol):
9.8E-05                       25                 M     9CIBAG

Octanol/water partitioning (log Kow):
2.10*                         25                 M     9CIBAG

Acid dissociation (pKa):
1.62                                             M     9CIBAG

Soil sorption:
soiltype        temp.   Kd      Koc      %om   pH     reference
                                 138                  ETOCDK 8:339-357,1989
                                                      9EINSP PP.23-67
                                                      9HFEDP
                                 230                  8GLEAM
                                 112                  8CREAM
                                 160                  JPFCD2 22:55-69,1987
CLAY                     4.31    155     4.8   5.9    9CIBAG
SAND                     0.65    124     0.9   6.5    9CIBAG
                                 115                  9CIBAG
                                 114                  9CIBAG
                                 140*                 JEVQAA 16:422-428,1987
                                                      SCSFAD 44:1-8,1985
                                 144                  8INSFO
SANDY LOAM               1.27    114     1.9   7.5
LOAM                     0.48    103     0.8   6.7
                                 

Field Dissipation halflife(days):
value             test area         pH           source    reference
26                FL CROP, SAND                     M      9CIBAG
87                FL BARE, SAND                     M      9CIBAG
125               OR BARE, LOAM                     M      9CIBAG
69                MO CROP, LOAM                     M      9CIBAG
55                MO BARE, LOAM                     M      9CIBAG
186               MN BARE, LOAM                     M      9CIBAG
44                FL BARE                           M      9CIBAG
149               CA BARE, SNDY LM                  M      9CIBAG
119               OR CROP, LOAM                     M      9CIBAG
33                FL CROP, SAND                     M      9CIBAG
89(26-186)*

Halflife in soil:
Soiltype             aerobic        anaerobic    source    reference
                      91              58            M      9CIBAG


Comments: