ARS PESTICIDE PROPERTIES last update May 1995


name:PARAQUAT DICHLORIDE                       CASRN: 1910-42-5

molecular formula: C12H14CL2N2
molecular weight : 257.2
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):
300    -                                         H     9ACHB2

Decomposition point(deg C):
       -    300                                  H     9ACHB2

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):

Photolysis (per day):

Vapor pressure (mPa):
NONVOLIT*                                        H     9HERBH
                                                 M     8ICIAG

Water solubility (ppm):       -temp-         -source- -reference-
6.2E05*                                          M     8ICIAG

Organic solubility (ppm):

Henrys law (Pa m3/mol):

Octanol/water partitioning (log Kow):
-4.5*                            20              M     8ICIAG 03/01/90

Acid dissociation (pKa):


Soil sorption:
soiltype      temp.   Kd    Koc    %om   pH  source    reference
                            15473               R      EESADV
                            17700               R      8INSFO
                            15500               C      8GLEAM
                            16,200*

Field Dissipation halflife(days):
value            test area        pH   %OM   source    reference
487-4747                                        R      9EINSP PP.23-67
99                                              C      8GLEAM
487                                             R      8INSFO
1067(99-4747)*

Halflife in soil:
Soiltype             aerobic      anaerobic   source   reference

Comments: