ARS PESTICIDE PROPERTIES last update May 1995


name:GLYPHOSATE                                CASRN: 1071-83-6

molecular formula: C3H8NO5P
molecular weight : 169.1
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.
_________________________________________________________________________

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


Boiling point(deg C):
       -

Melting point(deg C):
200    -                                         H     9ACHB2

Decomposition point(deg C):
       -    

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
STABLE *                         5-30    3,6,9    M    9MONSA

Photolysis (per day):
STABLE *             SOIL        22
STABLE *             WATER       24.5    5-9      M    9MONSA

Vapor pressure (mPa):
<0.010 *                         25               M    9MONSA



Water solubility (ppm):        -temp-       -source-  -reference-
1.2E+04 *                        25                    9HERBH

Organic solubility (ppm):

Henrys law (Pa m3/mol):
<1.4E-07 *                       25             M      9MONSA

Octanol/water partitioning (log Kow):
-1.6 *                                          M      9MONSA

Acid dissociation (pKa):
5.6 *                                           M       9M0NSA


Soil sorption:
soiltype         temp.   Kd      Koc      %om   pH     reference
                                 2640                  EESADV
                                 2100 *                EESADV
                                 500                   8GLEAM
DUPO SILT LOAM          33                             9MONSA
DRMMER SLTY CLY         324                            9MONSA

Field Dissipation halflife(days):
value             test area        pH       source     reference
21                                             H       9ACHB2 1983 ED.
38                                             R       9EINSP PP.23-67
<60                                            H       9HERBH
30                                             C       8GLEAM
47.2                                           M       9MONSA
14.8              FOREST SOIL
24.2              FOREST SOIL
2-174             SOIL 5-77 FIELD              M       9MONSA
27-56             SOIL 2-82 FIELD              M       9MONSA
27.9-30.9         SOIL 3-79 FIELD              M       9MONSA
9.5-14.3          FOLIAGE 6-79 FILED           M       9MONSA
37(2-174) *

Halflife in soil:
Soiltype            aerobic      anaerobic   source    reference
                     0.9 *                      M      9MONSA

Comments:
AEROBIC 0.9=(0.6-1.1)