Metsulfuron-methyl

Common name metsulfuron-methyl

IUPAC name methyl 2-(4-methoxy-6-methyl-1,3,5-triazin-2-ylcarbamoylsulfamoyl)benzoate 

Chemical Abstracts name methyl 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoate 

CAS RN [74223-64-6] 

Composition Tech. is >96%. 

Mol. wt. 381.4 

M.f. C14H15N5O6S 

Form Colourless crystals; (tech., off-white solid, with a faint ester-like odour). 

M.p. 162 癈  V.p. 3.3 ´ 10-7 mPa (25 篊) 

KOW logP = 0.018 (pH 7, 25 癈) 

Henry 4.5 ´ 10-11 Pa m3 mol-1 (pH 7, 25 篊) 

S.g./density 1.447 (20 癈) 

Solubility In water 0.548 (pH 5), 2.79 (pH 7), 213 (pH 9) (all in g/l, 25 篊). In hexane 5.84 ´ 10-1, ethyl acetate 1.11 ´ 104, methanol 7.63 ´ 103, acetone 3.7 ´ 104, dichloromethane 1.32 ´ 105, toluene 1.24 ´ 103 (all in mg/l, 25 篊). 

Mode of action

Selective systemic herbicide absorbed through the roots and foliage and translocated to the apex of the plants. Symptoms appear within days with death within 2-4 weeks. 

Uses Controls a wide range of grass and broad-leaved weeds