ARS PESTICIDE PROPERTIES DATABASE last updated May 1995

name: PACLOBUTRAZOL                  CASRN: 76738-62-0   

molecular formula: C15H20CLN3O                
molecular weight: 293.8                      
physical state: S                      
(L=liquid; G=gas; S=solid)                    
reference: 9PMED9

__________________________________________________________________________
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):
165 - 166                                    H      9PME10

Decomposition point (deg C):

Heat of vaporization (deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
STABLE                                 4-9   H      9PME10
  
Photolysis (per day):
STABLE                                 7     H      9PME10

Vapor pressure (mPa):
0.001*                          20           H      9PME10
                                             H      9ACHB2 1983
2.9E5                                        H      9FACHB 1990

Water solubility (ppm): 
26*                             20           H      9PME10
35                                           H      9PMED9
                                             H      9ACHB2 1983
                                             H      9FACHB 1990

Organic solubility (ppm):
1.1E5       ACETONE             20           H      9PME10
1.8E5       CYCLOHEXANONE       20           H      9PME10
1.0E5       DICHLOROMETNANE     20           H      9PME10
1.0E4       HEXANE              20           H      9PME10
6.0E4       XYLENE              20           H      9PME10
1.5E5       METHANOL            20           H      9PME10
5.0E4       PROPYLENE GLYCOL    20           H      9PME10

Henrys law (Pa m3/mol):
1.13E-5                         20           H      9PME10

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

Acid dissociation (pKa):
                                                          

Soil sorption:
soiltype         temp.    Kd     Koc    %om    pH   reference
--------         -----    --     ---    ---    --   ---------
                                 303                9PMED9                   
                                                    CMSHAF 10: 833-846 (1981)
                                 144                6USEPA
                                 235                6USEPA
                                 260                6USEPA
                                 339                6USEPA
                                 945                6USEPA
                                 500*              

Field dissipation halflife(days):
value              test area          pH    source  reference
-----              ---------          --    ------  ---------
180-360                                      H      9PMED9
450-973            CA,WV,FL                  P      6EPAPF vol. I
95-190             NC                        P      6EPAPF vol. I
123-189            MISS                      P      6EPAPF vol. I
123-337            IL                        R      6USDAS
7-14               CA                        R      6USDAS
30-210                                       P      6EPAPF vol. I
200*                                         W

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

Comments: