99283-01-9

Bensulfuron is a herbicide normally used as the methyl variant. It is not expected to be persistent in soil and as it is considered moderately mobile there are some risks of leaching to groundwater. Based on its physico-chemical properties there may also be a risk of bio-concentration. Its is moderately toxic to aquatic plants and to earthworms.

Bensulfuron is used in for controlling broadleaf weeds in rice paddies, use 20-30 g/ha.

ChEBI: An N-sulfonylurea that is urea in which a hydrogen attached to one of the nitrogens has been replaced by an (o-carboxybenzyl)sulfonyl group, while a hydrogen attached to the other nitrogen has been replaced by a 4,6-dimethox pyrimidin-2-yl group. An acetolactate synthase inhibitor, it is used (particularly as its methyl ester, bensulfuron-methyl) as a herbicide for the control of a variety of both annual and perennial weeds in crops, particularly wheat and rice.

Bensulfuron, is usually prepared as the methyl ester and this is commercially synthesised through a multi-step process involving sulfonylurea chemistry. The production begins with the preparation of a pyrimidine sulfonyl chloride intermediate, which is then reacted with methylated aniline to form the sulfonylurea linkage characteristic of bensulfuron-methyl.

Selective, systemic action being absorbed through foliage and roots. Inhibits plant amino acid synthesis - acetohydroxyacid synthase AHAS

Herbicide; Metabolite