Title: Halosulfuron-methyl
CAS Registry Number: 100784-20-1
CAS Name: 3-Chloro-5-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-1-methyl-1
H-pyrazole-4-carboxylic acid methyl ester
Synonyms: methyl 3-chloro-5-(4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl)-1-methylpyrazole-4-carboxylate
Manufacturers' Codes: MON-12000; MON-12037; NC-319
Trademarks: Manage (Monsanto); Permit (Nissan)
Molecular Formula: C13H15ClN6O7S
Molecular Weight: 434.81
Percent Composition: C 35.91%, H 3.48%, Cl 8.15%, N 19.33%, O 25.76%, S 7.37%
Literature References: Sulfonylurea herbicide. Prepn: S. Yamamoto
et al., JP Kokai 85 208977;
eidem, US 4668277 (1985, 1987 both to Nissan); S. Yamamoto
et al., ACS Symp. Ser. 504, 34 (1992). Physical properties and field trials in corn: K. Suzuki
et al., Brighton Crop Prot. Conf. - Weeds 1991, 31. Field trials in landscape plants: R. T. Hurt, W. K. Vencill,
J. Environ. Hort. 12, 135 (1994).
Properties: White powder, mp 172-173°. Vapor pressure (25°): 2.8 ′ 10-12 mm Hg. Soly in water (25°): 36 mg/l. LD50 orally in rats: 8865 mg/kg; dermally in rabbits: >2000 mg/kg; LC50 (4 hr) in rats: >4.3 mg/l (Suzuki).
Melting point: mp 172-173°
Toxicity data: LD50 orally in rats: 8865 mg/kg; dermally in rabbits: >2000 mg/kg; LC50 (4 hr) in rats: >4.3 mg/l (Suzuki)
Use: Herbicide.