Synonyms: methyl 2-[(4-ethoxy-6-methylamino-1,3,5-triazin-2-yl)carbamoylsulfamoyl]benzoate (IUPAC) DPX-A7881
CAS No.: 97780-06-8
Molecular Weight: 410.4038
Molecular Formula: C15H18N6O6S
Form White, odourless, crystalline solid.
M.p. 194 °C
V.p. 7.73 × 10-10 mPa (25 °C)
Solubility In water 1.7 (pH 5), 50 (pH 7), 410 (pH 9) (all in mg/l, 25 °C). In acetone 1.6, acetonitrile 0.83, ethanol 0.17 (all in g/l).
Stability Stable at pH 7 and pH 9. Hydrolysis occurs more rapidly at pH 5, DT50 41d.
Photolysis is not a major degradation pathway. Acidic in reaction. No evidence of exothermic reaction or explosive behaviour. pKa 4.6
Ethametsulfuron Methyl is a branched chain amino acid synthesis inhibitor, affecting sensitive weeds through inhibition of the enzyme acetolactate synthase, which leads to the rapid cessation of cell division and subsequent growth processes in plants. A post-emergence, selective herbicide acting primarily through foliar uptake, with little or no soil activity. Used to control post-emergencewild mustard, hempnettle and other broad-leaved weeds in oilseed rape, at dosage of 15-20g/ha.
Specification*95% TC and formulations
Risks and Safety Information
Oral Acute oral LD50(rats) >5000mg/kg. Skin and eye Acute percutaneous LD50( rabbits) >2000mg/kg. Non-irritating to skin; mild irritant of eyes (rabbits). Non-sensitising to skin (guinea pigs).
Birds Acute oral LD50(bobwhite quail 2500), Dietary LC50 (8d for bobwhite quail) >5620mg/kg diet. Fish LC50 (96h for bluegill sunfish and rainbow trout) >600 mg/l.