ARS PESTICIDE PROPERTIES last update May 1995


name:FONOFOS                                   CASRN: 944-22-9

molecular formula: C10H15OPS2
molecular weight : 246.32
physical state   : L
(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):
130    -             0.1mmHg                      H    9ACHB2

Melting point(deg C):
       -

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
0.00161*                         25     5,7      M     8ICIAG
0.00533*                         25     9        M     8ICIAG

Photolysis (per day):
0.077*               SOIL        25     5        M     8ICIAG,03/01/90

Vapor pressure (mPa):
45*                              25              M     8ICIAG
28                                               H     9ACHB2 7TH ED.,1977
27                               25              E     JAFCAU 18:814-818,1970


Water solubility (ppm):     -temp-          -source-   -reference-
13                            25                 E     JAFCAU 18:814-818,1970
                                                 H     9ACHB2 1983 ED.
                                                 C     8GLEAM
                                                 H     9ACHB2 7TH ED.,1977
14                                               E     ETOCDK 8:339-357,1989
16.9*                                            M     8ICIAG


Organic solubility (ppm):
MISCIBLE*  ACETONE,ETHANOL                       H     9PMED8
MISCIBLE*  KEROSENE,XYLENE                       H     9PMED8
MISCIBLE*  4-METHYLPENTAN-2-ONE                  H     9PMED8

Henrys law (Pa m3/mol):
0.656*                                           M     8ICIAG

Octanol/water partitioning (log Kow):
3.9*                             25              M     8ICIAG 

Acid dissociation (pKa):


Soil sorption:
soiltype      temp.   Kd     Koc    %om   pH  source  reference
                             68                 E     JEVQAA 16:422-428,1987
                                                E     SCSFAD 44:1-8,1985
                             3000               C     8GLEAM
                             5105               E     ETOCDK 8:339-357,1989
                             532                M     8ICIAG
                             870                M     8ICIAG
                             1920*

Field Dissipation halflife(days):
value         test area        pH             source  reference
60                                              E     SCSFAD 44:1-8,1985
                                                E     JEVQAA 16:422-428,1987
                                                      8CREAM
25                                              E     ETOCDK 8:339-357,1989
20                                              M     8ICIAG
37(20-60)*

Halflife in soil:
Soiltype           aerobic      anaerobic   source    reference


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