Bensulfuron methyl

Bensulfuron methyl Basic information
Product Name:Bensulfuron methyl
Synonyms:bensulfuron-methyl(patented-no-supply);benzoicacid,2-((((((4,6-dimethoxy-2-pyrimidinyl)amino)carbonyl)amino)sulfonyl;Benzoicacid,2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]methy]-,methylester;f5384;Bensulfuron-methyl W.P.;methylalpha-(4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl)-o-toluate;methylbensulfuron;methyl-α-(4,6-dimethoxypyrimidin-2-yl-crbamoyl sulfamoyl)-o-benzoate
CAS:83055-99-6
MF:C16H18N4O7S
MW:410.4
EINECS:401-340-6
Product Categories:Herbicides;MetabolitesPesticides&Metabolites;Pesticides&Metabolites;Urea structure;MetabolitesAnalytical Standards;PAHsPesticides&Metabolites;BA - BHEnvironmental Standards;Alphabetic;B;Urea structureMore...Close...;A-BAnalytical Standards;Alpha sort;AromaticsAlphabetic;Chemical Class;HERBICIDE
Mol File:83055-99-6.mol
Bensulfuron methyl Structure
Bensulfuron methyl Chemical Properties
Melting point 185-188°C
density 1.4087 (rough estimate)
refractive index 1.6000 (estimate)
storage temp. 0-6°C
solubility Acetonitrile (Slightly), Dichloromethane (Slightly), DMSO (Slightly)
pka12.34±0.70(Predicted)
form neat
color White to pale yellow
Odorodorless solid
BRN 7447488
Stability:Moisture Sensitive, Unstable in Solution
InChIKeyXMQFTWRPUQYINF-UHFFFAOYSA-N
CAS DataBase Reference83055-99-6
EPA Substance Registry SystemBensulfuron-methyl (83055-99-6)
Safety Information
Hazard Codes Xi;N,N,Xi
Risk Statements 43-51/53
Safety Statements 2-24-37-61
RIDADR UN 3077 9/PG 3
WGK Germany 2
RTECS DG8733000
HS Code 29350090
ToxicityLD50 orl-rat: >5 g/kg NNGADV 16,343,91
Bensulfuron methyl Usage And Synthesis
DescriptionBensulfuron-methyl (BSM) is a new kind of sulfonylurea herbicide widely used to control various weeds and sedges. It is moderately soluble in water, non-volatile and moderately mobile. It would not be expected to persistent in soil but could be persistent in water systems under certain conditions. It is not highly toxic to mammals. It also shows a low toxicity to birds and earthworms but is more of a concern to aquatic plants, algae and honeybees.
UsesBensulfuron methyl (BSM) was the first sulfonylurea herbicide commercialized for use in rice, and it remains the dominant sulfonylurea for broadleaf and sedge weed control in this crop.
DefinitionChEBI: Bensulfuron-methyl is the methyl ester of bensulfuron. An acetolactate synthase inhibitor, it is used as a herbicide for the control of a variety of both annual and perennial weeds in crops, particularly wheat and rice. It is not licensed for use within the UK. It has a role as a herbicide, an agrochemical and an EC 2.2.1.6 (acetolactate synthase) inhibitor. It is a N-sulfonylurea, a member of pyrimidines, a methyl ester and an aromatic ether. It derives from a bensulfuron.
Safety ProfileModerately toxic by ingestion.When heated to decomposition it emits toxic vapors ofNOx and SOx.
Metabolic pathwayBensulfuron methyl is metabolized by mammals and birds and the major metabolites identified include mono-O-demethylated and 5-hydroxylated bensulfuron methyl and 5-hydroxy-2-amino-3,5- dimethoxypyrimidine. As bird metabolites, cleavage of the pyrimidine ring of bensulfuron methyl is observed which results in two pyrimidine ring-opening metabolites. In rice plants, bensulfuron methyl undergoes rapid O-demethylation at one of the methoxy groups on the pyrimidine ring which will proceed through hydroxylation at the methyl group. Alcoholysis and hydrolysis of bensulfuron methyl (H1) involve mainly the breakdown of the urea moiety which leads to several degradation products, some of which are also identified as metabolites in mammals and plants.
Methyl 4'-Methoxyacetophenone Bensulfuron methyl PYRAZOPHOS Anisole Basic Violet 1 (Trifluoromethoxy)benzene Tribenuron methyl 3-(METHOXYMETHOXY)BENZALDEHYDE Kresoxim-methyl p-Anisic acid p-Anisidine p-Anisaldehyde Methanol Methyl acrylate Bensulfuron METSULFURON METHYL Azimsulfuron

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