ARS PESTICIDE PROPERTIES last update May 1995
name:HEXAZINONE CASRN: 51235-04-2
molecular formula: C12H20N4O2
molecular weight : 252.3
physical state : S
(L=liquid; G=gas; S=solid)
reference: 9ACHB2
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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):
115 - 117 M 9DUPON,1999
Decomposition point(deg C):
-
Heat of vaporization(deg C):
--RATE CONSTANTS--
Hydrolysis (per day):
STABLE* 25 5,7,9 M 9DUPON
Photolysis (per day):
0.0085* SOIL 30 6.4(1%OM) M 9DUPON
<0.0023* WATER 25 7 M 9DUPON
Vapor pressure (mPa):
8.5 86 M 9DUPON,1999
<1.3E-S 25 M 9DUPON,1999
Water solubility (ppm): -temp- -source- -reference-
29800 25 5,7,9 M 9DUPON,1999
Organic solubility (ppm):
7.9E05* ACETONE 25 H 9PMED8
9.4E05* BENZENE 25 H 9PMED8
3.88E6* CHLOROFORM 25 H 9PMED8
8.36E5* DIMETHYL FORMAMIDE 25 H 9PMED8
3E03* HEXANE 25 H 9PMED8
2.65E6* METHANOL 25 H 9PMED8
3.86E5* TOLUENE 25 H 9PMED8
Henrys law (Pa m3/mol):
1.1E-7* 25 5,7,9 M 9DUPON,1999
Octanol/water partitioning (log Kow):
1.17(1.16-1.19) 25 M 9DUPON
Acid dissociation (pKa):
2.2*
Soil sorption:
soiltype temp. Kd Koc %om pH source reference
SANDY LM(CA) 25 0.24 41 1.0 6.4 M 9DUPON
SANDY LM(MD) 25 0.45 37 2.1 6.5 M 9DUPON
SILT LM(IL) 25 1.03 41 4.3 5.4 M 9DUPON
LOAM(CA) 25 10.80 <300 0.8 8.0 M 9DUPON
SANDY LM(NJ) 25 0.18 34 0.9 6.4 M 9DUPON,1999
SANDY LM(ID) 25 0.56 74 1.3 8.3 M 9DUPON,1999
LOAM(CA) 25 0.59 54 1.9 7.7 M 9DUPON,1999
SILT LOAM(IL) 25 0.53 38 2.4 6.8 M 9DUPON,1999
Field Dissipation halflife(days):
value test area pH %OM source reference
<30 E SCSFAD 44:18-24,1985
90 M 9DUPON
79(30-180)*
75 SILT LOAM(DE) 6.4 2.7 M 9DUPON
75 SILT LOAM(IL) 5.0 4.0 M 9DUPON
154 SILT LOAM(MS) 7.0 0.7 M 9DUPON,1999
123 LOAM(DE) 6.3 1.5 M 9DUPON,1999
140 SANDY LOAM(CA) 8.1 1.1 M 9DUPON,1999
Halflife in soil:
Soiltype aerobic anaerobic source reference
88* M 9DUPON
SANDY LOAM 216DARK M 9DUPON,1999
SILT LOAM 39-54 M 9DUPON,1999
SANDY LOAM 27-72 M 9DUPON,1999
Comments: