Mesosulfuron-methyl

Description

Mesosulfuron-methyl · CAS 208465-21-8 · C17H21N5O9S2. UNII 22L00R79A6. Melting Point: 195.4 °C; Density: 1.53 gm/cu cm at 23 °C; Vapor Pressure: 1.1X10-8 mPa /SRC: 8.25X10-14 mm Hg/ at 25 °C.

Identification

CAS Registry Number	208465-21-8
PubChem CID	11409499
Molecular formula	C17H21N5O9S2
IUPAC name	methyl 2-[(4,6-dimethoxypyrimidin-2-yl)carbamoylsulfamoyl]-4-(methanesulfonamidomethyl)benzoate
UNII (FDA)	22L00R79A6

Computed Descriptors

Molecular Weight	503.5
XLogP3	0.6
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	12
Rotatable Bond Count	10
Exact Mass	503.07806961
Monoisotopic Mass	503.07806961
Topological Polar Surface Area	209
Heavy Atom Count	33
Formal Charge	0

Physical & Chemical Properties

Melting Point	195.4 °C
Density	1.53 gm/cu cm at 23 °C
Vapor Pressure	1.1X10-8 mPa /SRC: 8.25X10-14 mm Hg/ at 25 °C
Dissociation Constants	pKa = 4.35 at 20 °C

Physical description & handling notes

• Cream-colored solid
• Weakly pungent
• In hexane <0.2, acetone 13.66, toluene 0.013, ethyl acetate 2, methylene chloride 3.8 (all in g/L, 20 °C)
• In water (g/L at 20 °C): 7.24X10-3 (pH 5); 0.483 (pH 7); 15.39 (pH 9)
• log Kow = 1.39 (pH 5); -0.48 (pH 7); -2.06 (pH 9)
• Oil dispersion; water dispersible granule.

GHS Hazard Classification

Reported hazard statements	H400, H410

Documented Uses

• Herbicides (pyrimidinylsulfonylurea herbicides)
• For early to mid post-emergence control of grass and some broad-leaved weeds in winter, spring and durum wheat, triticale and rye ... For use in combination with mefenpyr-diethyl.
• Mesosulfuron-methyl can be made by reaction of methyl 2-sulfamoylchloride benzoate with 2-amino-4,6-dimethoxypyrimidine in the presence of a base.
• Mesosulfuron-methyl belongs to the class of chemicals called sulfonyl ureas. The chemical works by inhibiting the enzyme acetolactate synthase (ALS), which leads to depletion of key amino acids that are necessary for protein synthesis and plant growth.

Synonyms

Mesosulfuron-methyl; 208465-21-8; Mesomaxx; OSPREY; SILVERADO; DTXSID6034712; 22L00R79A6; AE-F130060; methyl 2-({[(4,6-dimethoxypyrimidin-2-yl)carbamoyl]amino}sulfonyl)-4-(methanesulfonamidomethyl)benzoate; Mesosulfuron methyl; methyl 2-((((4,6-dimethoxypyrimidin-2-yl)carbamoyl)amino)sulfonyl)-4-(methanesulfonamidomethyl)benzoate; RefChem:156679; DTXCID4014712; MFCD04112616; Mesosulfuron-methyl [ISO]; methyl 2-[(4,6-dimethoxypyrimidin-2-yl)carbamoylsulfamoyl]-4-(methanesulfonamidomethyl)benzoate

Frequently Asked Questions

What are the CAS number and molecular formula of Mesosulfuron-methyl?

CAS 208465-21-8; molecular formula C17H21N5O9S2; molecular weight — g/mol.

What other names is Mesosulfuron-methyl known by?

Mesosulfuron-methyl, 208465-21-8, Mesomaxx, OSPREY, SILVERADO, DTXSID6034712.

Is Mesosulfuron-methyl classified as hazardous?

Hazard statements reported: H400, H410.

What are the key physical properties of Mesosulfuron-methyl?

Melting Point: 195.4 °C; Density: 1.53 gm/cu cm at 23 °C; Vapor Pressure: 1.1X10-8 mPa /SRC: 8.25X10-14 mm Hg/ at 25 °C; Dissociation Constants: pKa = 4.35 at 20 °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.