Primisulfuron-methyl
Title: Primisulfuron-methyl
CAS Registry Number: 86209-51-0
CAS Name: 2-[[[[[4,6-Bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoic acid methyl ester
Additional Names: 2-[3-(4,6-bis(difluoromethoxy)pyrimidin-2-yl)ureidosulfonyl]benzoic acid methyl ester; N-(2-methoxycarbonylphenylsulfonyl)-N¢-[4,6-bis(difluoromethoxy)pyrimidin-2-yl]urea
Manufacturers' Codes: CGA-136872
Trademarks: Beacon (Syngenta); Tell (Syngenta)
Molecular Formula: C15H12F4N4O7S
Molecular Weight: 468.34
Percent Composition: C 38.47%, H 2.58%, F 16.23%, N 11.96%, O 23.91%, S 6.85%
Literature References: Post-emergence sulfonylurea herbicide. Prepn: W. Meyer et al., EP 84020; eidem, US 4478635 (1983, 1984 both to Ciba-Geigy). Comprehensive description: W. Maurer et al., Proc. Br. Crop Prot. Conf. - Weeds 1987, 41-48. Field trial in corn: C. L. Foy, H. L. Witt, Weed Technol. 4, 615 (1990).
Properties: Colorless crystals, mp 203.1° (Maurer); also reported as mp 186-188° (Meyer). Vapor pressure (20°): <7.5 ´ 10-12 mm Hg. Soly in water (pH 7): 0.07 g/l at 20°. LD50 in rats (mg/kg): >4000 orally; >2000 dermally (Maurer).
Melting point: mp 203.1° (Maurer); mp 186-188° (Meyer)
Toxicity data: LD50 in rats (mg/kg): >4000 orally; >2000 dermally (Maurer)
Use: Herbicide.

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