4602. Halosulfuron-methyl

Nomenclature

CAS number: 100784-20-1
3-Chloro-5-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-1-methyl-1H-pyrazole-4-carboxylic acid methyl ester; methyl 3-chloro-5-(4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl)-1-methylpyrazole-4-carboxylate; MON-12000; MON-12037; NC-319; Manage (Monsanto); Permit (Nissan).
C13H15ClN6O7S; mol wt 434.81.
C 35.91%, H 3.48%, Cl 8.15%, N 19.33%, O 25.76%, S 7.37%.

Description and 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).

Chemical structure

Properties

White powder, mp 172-173°. Vapor pressure (25°): 2.8 × 1012 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).

Use

Herbicide.