ARS PESTICIDE PROPERTIES last update May 1995


name:BENEFIN                                   CASRN: 1861-40-1

molecular formula: C13H16F3N3O4
molecular weight : 335.28
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):
121    -    148

Melting point(deg C):
65     -   66.5                                    H    9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):


--RATE CONSTANTS--

Hydrolysis (per day):
<0.023*                          25     5-9        M    6DOWCH

Photolysis (per day):
1.67*                WATER       25                M    6DOWCH

Vapor pressure (mPa):
10.4                             25                H    9HERBH
3.7                              25                H    9ACHB2
4                                20                R    9HRLCP
8.8*                             25                M    7LILLY


Water solubility (ppm):        -temp-         -source-  -reference-
0.1                              25                H    9HERBH
                                                   M    7LILLY

Organic solubility (ppm):

Henrys law (Pa m3/mol):
29.4*                            25                M    6DOWCH 

Octanol/water partitioning (log Kow):
5.29*                                              M    6DOWCH

Acid dissociation (pKa):

Soil sorption:
soiltype      temp.   Kd     Koc      %om     pH  source  reference
                             781                     R    8EETNS
                             10700                   R    EESADV
                             379                     C    8CREAM
                             9000                    M    7LILLY
                             8240*
SAND           25     27.0   9300     0.5     7.7    M    6DOWCH
SANDY LOAM     25     74.9   9300     1.4     5.7    M    6DOWCH
LOAM           25     88.6   8500     1.8     6.5    M    6DOWCH
CLAY LOAM      25    116.6   10100    2.0     6.9    M    6DOWCH


Field Dissipation halflife(days):
value             test area        pH          source     reference
80(24-131)*
40                                                M       7LILLY
60                                                R       8OUSSD
117               SANDY LOAM(GA)                  M       6DOWCH
131               LOAM(GA)                        M       6DOWCH

        
Halflife in soil:
Soiltype               aerobic      anaerobic   source    reference
                         51                       M       6DOWCH

Comments:
SOIL SORPTION VALUE 824=824(781-10100)