ARS PESTICIDE PROPERTIES last update May 1995


name:GLUFOSINATE-AMMONIUM                      CASRN: 77182-82-2

molecular formula: C5H15N2O4P
molecular weight : 198.19
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):
ca.210 -                                         M     8HOECH

Decomposition point(deg C):
       - ca. 210

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
<2.3E-3                        25     5,7,9       M     8HOECH

Photolysis (per day):
1.95E-2              SOIL                         M     8HOECH
<2.3E-3              WATER                        M     8HOECH

Vapor pressure (mPa):
<0.1                           25                 M     8HOECH


Water solubility (ppm):      -temp-          -source-  -reference-
1.37E06*                                          H     9ACHB2
                                                  M     8HOECH

Organic solubility (ppm):
140        ETHYL ACETATE       25                 M     8HOECH
160        ACETONE             25                 M     8HOECH
140        TOLUENE             25                 M     8HOECH
200        N-HEXANE            25                 M     8HOECH
650        ETHYL ALCOHOL       25                 M     8HOECH

Henrys law (Pa m3/mol):
<1.4E-8                                           M     8HOECH

Octanol/water partitioning (log Kow):
<0.1                           22       7         M     8HOECH

Acid dissociation (pKa):
<2  pK1                                           M     8HOECH
2.9 pK2                                           M     8HOECH
9.8 pK3                                           M     8HOECH 

Soil sorption:
soiltype      temp.   Kd     Koc    %om   pH   source   reference
SILT LOAM                    352                  M     8HOECH
SILT LOAM                    156                  M     8HOECH
SAND                         9.6                  M     8HOECH
VOLCANIC ASH                 1229                 M     8HOECH
                             430*


Field Dissipation halflife(days):
value         test area       pH    %OM        source   reference
30-40                                             H     9ACHB2
13(6-20)*                                         M     8HOECH

Halflife in soil:
Soiltype         aerobic      anaerobic        source   reference
SANDY LOAM        3.7                             M     8HOECH
SILT LOAM         8.3                             M     8HOECH
LOAMY SAND        6.4                             M     8HOECH
MARSHY SOIL       6.6                             M     8HOECH
PEAT SOIL         10.0                            M     8HOECH
                   7*                             M     8HOECH
                                5-10              M     8HOECH

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