Flumetsulam

Description

Flumetsulam · CAS 98967-40-9 · C12H9F2N5O2S. UNII X89F0S6LW8. Melting Point: 250-251 °C; Flash Point: 93 °C (199 °F); Vapor Pressure: VP: 3.7X10-13 Pa at 25 °C.

Identification

CAS Registry Number	98967-40-9
PubChem CID	91759
Molecular formula	C12H9F2N5O2S
IUPAC name	N-(2,6-difluorophenyl)-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidine-2-sulfonamide
UNII (FDA)	X89F0S6LW8

Computed Descriptors

Molecular Weight	325.30
XLogP3	1.6
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	8
Rotatable Bond Count	3
Exact Mass	325.04450204
Monoisotopic Mass	325.04450204
Topological Polar Surface Area	97.6
Heavy Atom Count	22
Formal Charge	0

Physical & Chemical Properties

Melting Point	250-251 °C
Flash Point	93 °C (199 °F)
Vapor Pressure	VP: 3.7X10-13 Pa at 25 °C
Vapor Pressure	2.78X10-12 mm Hg at 25 °C (3.7X10-7 mPa)
LogP	log Kow = 0.21
Dissociation Constants	pKa = 4.6
Other Experimental Properties	MP: 253 °C. VP: 2.8X10-15 mm Hg at 25 °C

Physical description & handling notes

• White powder
• Off-white solid
• Off-white to tan solid
• Odorless
• In water, 49 mg/L (pH 2.5); solubility increases with pH
• In water, 0.049 g/L at pH 2.5; 5.65 g/L at pH 7

Regulatory Status

GHS notification summary	2.4% (3 / 125)

GHS Hazard Classification

GHS notification summary	2.4% (3 / 125)
Reported hazard statements	H332 (30.4%), H400 (97.6%), H410 (67.2%)

Documented Uses

• Flumetsulam is a broad-spectrum, season-long herbicide used in the control of broadleaf weeds in soybeans, corn, and other major crops. Flumetsulam is applied as a soil-incorporated preplanting, preemergence, or postemergence herbicide depending on the formulation, at a maximum use rate of 80 g per hectare.
• A selective inhibitor of acetolactate synthase, a key enzyme in branched chain amino acid biosynthesis.
• Flumetsulam can be made by reaction of 5- methyl[1,2,4]triazolo-2-sulfonylchloride with 2,6-difluoroaniline in the presence of a base.
• Preparation: W.A. Kleschick et al., European Patent Office patent 142152 (1985 to Dow). Improved process: L.H. McKendry, United States of America patent 4910306 (1990 to Dow).
• Registration Notes: Outside USA: Broadstrike, Scorpion, Preside in Argentina. Broadstrike Dual Magnum and Fieldstar in Canada.
• Following oral administration of (14)C-flumetsulam, approximately 50-75% of the administered radiolabel was excreted in the urine primarily as unchanged parent material, though two minor (<20% of urinary radiolabel) metabolites, believed to be conjugates of parent flumetsulam, were found in the urine of mice.

Synonyms

Flumetsulam; 98967-40-9; Flumetsulam [ANSI]; DTXSID4032615; UNII-X89F0S6LW8; FLUMETSULAM [MI]; N-(2,6-difluorophenyl)-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine-2-sulfonamide; (1,2,4)Triazolo(1,5-a)pyrimidine-2-sulfonamide, N-(2,6-difluorophenyl)-5-methyl-; PYTHON (DOW AGROSCI.); DTXCID2012615; HSDB 8439; EC 619-383-6; BROADSTRIKE (DOW AGROSCI.); DE-498; Flumetsulam (ANSI); [1,2,4]Triazolo[1,5-a]pyrimidine-2-sulfonamide, N-(2,6-difluorophenyl)-5-methyl-

Frequently Asked Questions

What are the CAS number and molecular formula of Flumetsulam?

CAS 98967-40-9; molecular formula C12H9F2N5O2S; molecular weight — g/mol.

What other names is Flumetsulam known by?

Flumetsulam, 98967-40-9, Flumetsulam [ANSI], DTXSID4032615, UNII-X89F0S6LW8, FLUMETSULAM [MI].

Is Flumetsulam classified as hazardous?

2.4% of GHS notifications report no hazard classification (3 of 125).

What are the key physical properties of Flumetsulam?

Melting Point: 250-251 °C; Flash Point: 93 °C (199 °F); Vapor Pressure: VP: 3.7X10-13 Pa at 25 °C; Vapor Pressure: 2.78X10-12 mm Hg at 25 °C (3.7X10-7 mPa).

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.