Metsulfuron-methyl
Title: Metsulfuron-methyl
CAS Registry Number: 74223-64-6
CAS Name: 2-[[[[(4-Methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoic acid methyl ester
Additional Names: N-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonyl]-2-methoxycarbonylbenzenesulfonamide
Manufacturers' Codes: DPX-T6376
Trademarks: Ally (DuPont); Allie (DuPont)
Molecular Formula: C14H15N5O6S
Molecular Weight: 381.36
Percent Composition: C 44.09%, H 3.96%, N 18.36%, O 25.17%, S 8.41%
Literature References: Sulfonyl urea used as pre- and postemergence herbicide. Prepn and herbicidal activity: G. Levitt, EP 7687 (1980 to Du Pont); idem, US 4383113 (1983 to Du Pont). Comparison with other herbicides in cereals: A. Aamisepp, Weeds Weed Control 26, 26 (1985). Efficacy in control of gorse: A. I. Popay et al., Proc. 38th N. Z. Weed Pest Control Conf. 1985, 94. Review of properties, herbicidal activity: P. Lefebvre, Def. Veg. 38, 331 (1984).
Properties: White crystals, mp 163-166°. Vapor pressure at 25°: 5.8´10-5 mm Hg. Soly in water: 0.27 g/l at pH 4.59; 9.5 g/l at pH 6.11. LD50 in male and female rats, in male and female rabbits (mg/kg): >5000, >2000 orally. LC50 (96 hour) in American perch, rainbow trout: 150 ppm. LD50 in wild ducks: 2510 mg/kg (Lefebvre).
Melting point: mp 163-166°
Toxicity data: LD50 in male and female rats, in male and female rabbits (mg/kg): >5000, >2000 orally; LC50 (96 hour) in American perch, rainbow trout: 150 ppm; LD50 in wild ducks: 2510 mg/kg (Lefebvre)
Use: Herbicide.

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