ARS PESTICIDE PROPERTIES last update May 1995
name:METSULFURON ME CASRN: 74223-64-6
molecular formula: C14H15N5O6S
molecular weight : 381.4
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):
158 - M 9DUPON,1999
Decomposition point(deg C):
-
Heat of vaporization(deg C):
--RATE CONSTANTS--
Hydrolysis (per day):
0.033* 25 5 M 9DUPON
STABLE 25 7,9 M 9DUPON,1999
Photolysis (per day):
0.16* (4.7%om) SOIL 25 4.3 M 9DUPON
0.041* WATER 25 5 M 9DUPON
STAB;E WATER 25 7,9 M 9DUPON,1999
Vapor pressure (mPa):
3.3E-7* 25 9DUPON
Water solubility (ppm): -temp- -pH- -source- -reference-
548 25 5 M 9DUPON
2790 25 7 M 9DUPON
213,000 25 9 M 9DUPON
Organic solubility (ppm):
3.6E04* ACETONE 20 M 9DUPON,1999
1.21E05* DICHLOROMETHANE 20 M 9DUPON,1999
2.3E03* ETHANOL 20 M 9DUPON,1999
0.79* HEXANE 20 M 9DUPON,1999
7.3E03* METHANOL 20 M 9DUPON,1999
580* XYLENE 20 M 9DUPON,1999
Henrys law (Pa m3/mol):
2.32E-10 25 5 M 9DUPON,1999
4.5E-11* 25 7 M 9DUPON
5.97E-13 25 9 M 9DUPON,1999
Octanol/water partitioning (log Kow): -pH-
-1.7* 25 7 M 9DUPON
Acid dissociation (pKa):
3.3* M 9DUPON
Soil sorption:
soiltype temp. Kd Koc %om pH reference
35 9DUPON
61 9HERBH 6TH ED., 1989
CA.35 9DUPON
42*
SAND(NC) 25 0.36 206 0.3 6.1 9DUPON
SANDY LM(DE) 25 0.41 50 1.40 5.6 9DUPON
SILT LM(DE) 25 0.84 53 2.75 6.4 9DUPON
SILT LM(IL) 25 1.40 60 4.02 6.5 9DUPON
SANDY LM(ALBTA) 25 4.9 44 19.0 5.4 9DUPON
SANDY LM(ALBTA) 25 0.05 4 2.3 7.1 9DUPON
CLAY LM(ALBTA) 25 0.3 12 4.4 5.3 9DUPON
S.CLAY LM(MANIT) 25 0.3 9 5.8 7.5 9DUPON
LOAM(SASK) 25 0.15 7 3.6 7.6 9DUPON
LOAM(SASK) 25 0.65 29 3.9 5.4 9DUPON
S.LOAM(SASK) 25 0.35 12 5.2 7.7 9DUPON
CLAY LM(MANIT) 25 0.6 14 7.2 7.5 9DUPON
Field Dissipation halflife(days):
value test area pH %OM source reference
14-28 E 8PBCPW 2:531-540,1987
28(8-105)* 12 SITES 9DUPON
15 CANADA 7.8 6.4 M 9DUPON,1999
71 ID 8.0 M 9DUPON,1999
15 NC 4.9 0.3 M 9DUPON,1999
4 DE 6.4 1.4 M 9DUPON,1999
Halflife in soil:
Soiltype aerobic anaerobic source reference
8 SOILS** 28*(14-38) M 9DUPON
SANDY LM(DE) 10 M 9DUPON,1999
SILT LM(DE) 13 M 9DUPON,1999
SILT LM(DE) 11 M 9DUPON,1999
SANDY LM(DE) 38 M 9DUPON,1999
LOAM 38 M 9DUPON,1999
LOAM 27 M 9DUPON,1999
SILT LM 14-21 M 9DUPON,1999
Comments:
SOIL SORPTION KOC VALUE=42(4-206); WATER SOLUBILITY VALUE
548=PH5, 2790=PH7, 213000=PH9; HENRYS LAW 4.5E-11=PH7;
OCTANOL WATER -1.7=PH7;AEROBIC=28(14-38) 25 DEGREES C.