ARS PESTICIDE PROPERTIES DATABASE last updated Oct 1, 2001


name: ABAMECTIN (AVERMECTIN)         CASRN: 71751-41-2


SELECTED VALUES FOR MODELING PURPOSES (from Hornsby, et al., 1996)

WATER SOLUBILITY (mg/L): 5
FIELD HALF-LIFE (days): 28
SOIL ORGANIC CARBON SORPTION (Koc, mL/g): 5000 E
VAPOR PRESSURE (mm Hg): 1.5 x 10-9


PUBLISHED AND MANUFACTURER VALUES AND SOURCES

molecular formula: C48H72O14(B1a)                     
molecular weight: 873.1                      
physical state: S                      
(L=liquid; G=gas; S=solid)
reference: JPFCD2 B16: 309-324 (1981)

__________________________________________________________________________
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):
150 - 155                                  H        9PME10

Decomposition point (deg C):

Heat of vaporization (deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
STABLE             WATER        25   5,7,9 H        9PME10
Photolysis (per day):

Vapor pressure (mPa):
0                                          W               
<2.0E-4*                                   H        9PME10

Water solubility (ppm): 
5.00*                           20         P        6USEPA
0.01                            20         H        JPFCD2 B16: 309-324 (1981)

Organic solubility (ppm):
3.5E5             TOLUENE       21         H        9PME10
1.0E5             ACETONE       21         H        9PME10
7.0E4             ISOPROPANOL   21         H        9PME10
2.5E4             CHLOROFORM    21         H        9PME10
2.0E4             ETHANOL       21         H        9PME10
1.0E4             N-BUTANOL     21         H        9PME10
6.0E3             CYCLOHEXANE   21         H        9PME10
 
Henrys law (Pa m3/mol):
<3.5E-5                                    P        6USEPA
                                           H        9PME10
 
Octanol/water partitioning (log Kow):

Acid dissociation (pKa):
                                                          

Soil sorption:
soiltype         temp.    Kd     Koc    %om    pH   reference
--------         -----    --     ---    ---    --   ---------  
                                 4760               JPFCD2 B16:309-324 (1981)
                                 23103              6USEPA
                                 1672               6USEPA
                                 5328               6USEPA
                                 5000*              W

Field dissipation halflife(days):
value              test area          pH    source  reference
-----              ---------          --    ------  ---------
14-28                                       E       JAFCAU 32: 94-102 (1984)
28-56                                       E       JAFCAU 32: 94-102 (1984)
56(B1a)                                     E       JAFCAU 32: 94-102 (1984)
28*                                         W

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

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