ARS PESTICIDE PROPERTIES DATABASE last updated May 1995

name: PERIMIPHOS-ETHYL               CASRN: 23505-41-1   

molecular formula: C13H24N3O3PS               
molecular weight: 333.4                      
physical state: L                     
(L=liquid; G=gas; S=solid)
reference: 9PME10

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

Boiling point (deg C):

Melting point (deg C):
15 - 18 (TECH)                               H      9PME10

Decomposition point (deg C):
C.194                                        H      9PME10

Heat of vaporization (deg C):

--RATE CONSTANTS--

Hydrolysis (per day):

Photolysis (per day):

Vapor pressure (mPa):
0.68*                           20           H      9PME10
40                              25           H      9PMED9
13.3                            25           H      9FACHB 1990

Water solubility (ppm): 
<1                              30           H      9PMED9
93                              20           H      9FACHB 1993
2.3*                                         H      9PME10

Organic solubility (ppm):
MISCIBLE WITH MOST ORGANIC SOLVS.            H      9PME10

Henrys law (Pa m3/mol):
0.099                                        H      9PME10

Octanol/water partitioning (log Kow):
5.0                                          H      9PME10

Acid dissociation (pKa):
                                                          

Soil sorption:
soiltype         temp.    Kd     Koc    %om    pH   reference
--------         -----    --     ---    ---    --   ---------
                                 195000             9PMED9
                                                    CMSHAF 10: 833-846 (1981)
                                 2980               9FACHB 1993
                                                    CMSHAF 10: 833-846 (1981)
                                 300*               W               
                                                          

Field dissipation halflife(days):
value              test area          pH    source  reference
-----              ---------          --    ------  ---------
21-70                                        H      9PME10
45*                                          W                                                          

Halflife in soil:
soiltype           aerobic  anaerobic       source  reference
--------           -------  ---------       ------  ---------

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