Metsulfuron methyl CAS NO.74223-64-6

Common name Metsulfuron methyl Product category Herbicide ChemicalName 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl…

Common name Metsulfuron methyl Product category Herbicide ChemicalName 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoic acid CAS 74223-64-6 Structure Molecular Formula C14H15N5O6S Molecular Weight 381.36 Physical and Chemical Properties KOW logP = -1.74 (pH 7). Melting point: 158°C. Solubility In water 0.55 (pH 5), 2.79 (pH 7), 213 (pH 9) (all in g/l, 25 oC). In hexane 0.00079, xylene 0.58, ethanol 2.3, methanol 7.3, acetone 36, dichloromethane 121 (all in g/l, 20 oC). Stability Stable in air up to c. 140 oC. Hydrolysis DT50 (25 °C), 22 d (pH 5), stable (pH 7 and 9). pKa 3.3 Prevention Object Postemergence for most broadleaf weeds, some annual grass weeds in barley, wheat, pastures, rangeland, and noncropland. Toxicity Oral Acute oral LD50 for male and female rats >5000 mg/kg. Skin and eye Acute percutaneous LD50 for rabbits >2000 mg/kg. Mild skin irritant to guinea pigs, but not a skin sensitiser; moderate but reversible eye irritant. Inhalation LC50 (4 h) for male and female rats >5 mg/l air. Formulations 95% TC.60%WP.60%WS.20%WDG.20%DF.60%WDG.60%DF.