ARS PESTICIDE PROPERTIES last update May 1995


name:CYROMAZINE                                CASRN: 66215-27-8

molecular formula: C6H10N6
molecular weight : 166.19
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9CIBAG

_________________________________________________________________________
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):
220    -    222                                  H     9ACHB2,2ND ED.,1987

Decomposition point(deg C):
       -    310

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
STABLE*                          30              M     9CIBAG

Photolysis (per day):
STABLE*              WATER       25              M     9CIBAG
.0116*               SOIL        25     7        M     9CIBAG

Vapor pressure (mPa):
4.5E-4                           25              M     9CIBAG


Water solubility (ppm):        -temp-        -source- -reference-
1.1E+4                           20              H     9FACHB
1.36E+4*                         22              M     9CIBAG

Organic solubility (ppm):
1.7E+4*   METHANOL               20              H     9ACHB2,2ND ED.,1987

Henrys law (Pa m3/mol):
5.5E-9*                          25              M     9CIBAG

Octanol/water partitioning (log Kow):
-.155*                           25              M     9CIBAG

Acid dissociation (pKa):


Soil sorption:
soiltype         temp.   Kd      Koc      %om   pH     reference
                         50.38   1800     4.8   5.9    9CIBAG
                         1.09    208      0.9   6.5    9CIBAG
                         5.62    970      1.0   7.5    9CIBAG
                         0.61    81       1.3   7.8    9CIBAG
                                 765*

Field Dissipation halflife(days):
value          test area         pH           source   reference
75-180            CA                             M     9CIBAG
204-244           NB                             M     9CIBAG
185-284           FL                             M     9CIBAG
146-203           FL                             M     9CIBAG
189(75-284)*

Halflife in soil:
Soiltype            aerobic      anaerobic    source   reference
SANDY LOAM           142         STABLE          M     9CIBAG
SAND                 107                         M     9CIBAG
                     125*


Comments:
PHOTOLYSIS VALUE .0116 = ARTIFICIAL LIGHT