ARS PESTICIDE PROPERTIES DATABASE last updated Jan, 2002


name: BROMACIL ACID                                  CASRN: 314-40-9


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

WATER SOLUBILITY (mg/L): 700
FIELD HALF-LIFE (days): 60
SOIL ORGANIC CARBON SORPTION (Koc, mL/g): 32
VAPOR PRESSURE (mm Hg): 3.1 x 10-7
pKa: 9.1


PUBLISHED AND MANUFACTURER VALUES AND SOURCES

molecular formula: C9H13BrN2O2
molecular weight : 261.1
physical state   : S
(L=liquid; G=gas; S=solid)
reference: 9MERCK,10TH ED,P.190,1983

_________________________________________________________________________
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):
157.5  -    160                                  E     9USPAT,3,235,357,P17

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
<0.023*                         25     5,9       M     9DUPON

Photolysis (per day):
0.004*             SOIL        25     6.7       M     9DUPON
0.002*             WATER       25     5         M     9DUPON
0.007*             WATER       25     7         M     9DUPON
0.099*             WATER       25     9         M     9DUPON

Vapor pressure (mPa):
3.30E+2                       100               H     9ACHB2 
0.5E+1                         20               H     9ACHB2
4.1E-2                         25               M     9DUPON
3.30E-2                         0               E     SCSFAD, 44:5,1985


Water solubility (ppm):     -temp-   -pH-  -source-   -reference-
1.024E+03                     25               E      JPFCD2,VB19(3):302,1984
807                           25       5       M      9DUPON
700                           25       7       M      9DUPON
1280                          25       9       M      9DUPON

Organic solubility (ppm):
7.1E+4*   ACETONITRILE        25               M      9DUPON,1999
1.34E+5*  ETHANOL             25               M      9DUPON,1999
3.2E+4*   XYLENE              25               M      9DUPON,1999
1.67E+5*  ACETONE             25               M      9DUPON,1999

Henrys law (Pa m3/mol):
1.5E-5* (pH7)                 25               M      9DUPON

Octanol/water partitioning (log Kow): -pH-
1.88                          25        7      M      9DUPON
1.53                          25        5      M      9DUPON
1.63                          25        9      M      9DUPON,1999

Acid dissociation (pKa):
9.1                                                   9CREAM

Soil sorption:
soiltype     temp.  Kd      Koc     %om   pH  source  reference
                                             
SAND(FL)      25    0.09    12      1.3   7.0    M    9DUPON
SNDY LM(CA)   25    0.25    33      1.3   7.5    M    9DUPON
CLY LM(MD)    25    0.03    2.3     2.2   4.2    M    9DUPON
SLT LM(DE)    25    0.24    14      3.0   6.2    M    9DUPON

Field Dissipation halflife(days):
value          test area      pH   %OM     source    reference
207(61-349)*
106-349                                      R       9EINSP PP.23-67
150-180                                      H       9HERBH
350                                          E       JEVQAA 16:422-428,1987
61                                           R       8INSFO
120             DELAWARE      6.4   2.8      M       9DUPON
350                                          E       SCSFAD 44:1-8,1985
175             DELAWARE                     M       9DUPON

Halflife in soil:
Soiltype          aerobic      anaerobic   source    reference
SLTY CLY LM(DE)   275*                       M       9DUPON


Comments:
WATER SOLUBILITY=PH7; HENRYS LAW=PH7; OCTANOL WATER=PH7;
SOIL SORPTION KOC=32(2-72); AEROBIC=PH6.6