Chlorsulfuron

Description

Chlorsulfuron · CAS 64902-72-3 · C12H12ClN5O4S. UNII O6S620ML45. Melting Point: 176 °C; Melting Point: MP: 174-178 °C; Solubility: In water, 125 mg/L at 25 °C.

Identification

CAS Registry Number	64902-72-3
PubChem CID	47491
Molecular formula	C12H12ClN5O4S
IUPAC name	1-(2-chlorophenyl)sulfonyl-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea
UNII (FDA)	O6S620ML45

Computed Descriptors

Molecular Weight	357.77
XLogP3	2.3
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	7
Rotatable Bond Count	4
Exact Mass	357.0298527
Monoisotopic Mass	357.0298527
Topological Polar Surface Area	132
Heavy Atom Count	23
Formal Charge	0

Physical & Chemical Properties

Melting Point	176 °C
Melting Point	MP: 174-178 °C
Solubility	In water, 125 mg/L at 25 °C
Vapor Pressure	2.25X10-11 mm Hg at 25 °C
Vapor Pressure	0.81313 [mm Hg] @25 °C
LogP	1.54
Dissociation Constants	pKa = 3.4
Collision Cross Section	175.97 Ų [M+H]+
Collision Cross Section	179.87 Ų [M-H]-
Collision Cross Section	184.55 Ų [M+Na]+

Physical description & handling notes

• Chlorsulfuron appears as colorless crystals. Non corrosive. Insoluble in water. Used as an herbicide.
• Colorless or white odorless solid; [HSDB]
• White crystalline solid
• Crystals from ether
• Odorless
• Solubility (25 °C) : 4 g/L acetone; 102 g/L dichloromethane, <0.01 g/L hexane, 15 g/L methanol; 3 g/L toluene

GHS Hazard Classification

Reported hazard statements	H400, H410

Documented Uses

• Used as pre- and post-emergence herbicide to control weeds on cereal grains, pasture, rangeland, industrial sites, and turf grass; [Reference #1]
• A selective preemergence or early postemergence herbicide used at low rates.
• Chlorsulfuron is produced by reaction of 2-sulfonylisocyanate chlorobenzene with 2-amino-4,6-dimethoxy-1,3,5-triazine.
• Prepn: G. Levitt, German patent 2715786; idem, United States of America patent 4127405 (1977, 1978 both to du Pont).
• Absorbed by foliage and roots of both resistant and susceptible species, with acropetal and basipetal translocation.
• Chlorsulfuron, an inhibitor of acetolactate synthase markedly inhibited the growth of Lemna minor at concentrations of 10(-8) molar and above, but had no inhibitory effects on growth at 10(-9) molar. At growth inhibitory concentrations, chlorsulfuron caused a pronounced increase in total free amino acid levels within 24 hours. Valine, leucine, and isoleucine, however, became smaller percentages of the total free amino acid pool as the concentration of chlorsulfuron was increased. At concentrations of chlorsulfuron

Synonyms

CHLORSULFURON; 64902-72-3; Glean; Chlorsulfon; Telar; Trilixon; 2-Chlorsulfuron; Glean C; 1-(2-chlorophenyl)sulfonyl-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea; Glean 20DF; DPX 4189; DTXSID7023980; O6S620ML45; 1-(2-Chlorophenylsulfonyl)-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea; 2-Chloro-N-((4-methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonyl)-benzenesulfonamide; 1-((o-Chlorophenyl)sulfonyl)-3-(4-methoxy-6-methyl-s-triazin-2-yl)urea

Frequently Asked Questions

What are the CAS number and molecular formula of Chlorsulfuron?

CAS 64902-72-3; molecular formula C12H12ClN5O4S; molecular weight — g/mol.

What other names is Chlorsulfuron known by?

CHLORSULFURON, 64902-72-3, Glean, Chlorsulfon, Telar, Trilixon.

Is Chlorsulfuron classified as hazardous?

Hazard statements reported: H400, H410.

What are the key physical properties of Chlorsulfuron?

Melting Point: 176 °C; Melting Point: MP: 174-178 °C; Solubility: In water, 125 mg/L at 25 °C; Vapor Pressure: 2.25X10-11 mm Hg at 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.