Agent Name

Metsulfuron-methyl

CAS Number

74223-64-6

Formula

C14-H15-N5-O6-S

Major Category

Pesticides

Synonyms

2-(((((4-Methoxy-6-methyl-1,3,5-triazin-2yl)amino)carbonyl)amino)sulfonyl)benzoic acid methyl ester; ALLY; ALLY 20DF; Allie; Brush-off; DPD 63760H; DPX 6376; DPX-T 6376; Escort; Escort (pesticide); Granstar; Gropper; HCHA 92HA; Methyl 2-(((((4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino)carbonyl)amino)sulfonyl)benzoate; Methyl 2-(3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)ureidosulfonyl)benzoate; Methyl 2-(3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)ureidosulphonyl)benzoate; Metsulfuron methyl; Metsulfuron methyl ester [ANSI]; N-((2-Methylcarbonyl)phenyl)sulfonyl-N'-(6-methoxy-4-methyl-2-triazinyl)urea; N-((4-Methoxy-6-methyl-1,3,5-triazin-2-yl)aminocarbonyl)-2-methoxycarbonylbenzenesulfonamide; T 6376; Benzoic acid, 2-(((((4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino)carbonyl)amino)sulfonyl)-, methyl ester; [ChemIDplus]

Category

Herbicides, Sulfonylurea

Description

White solid; [Merck Index] Colorless or white to pale yellow solid with a mild sweet ester-like odor; [HSDB]

Sources/Uses

Used as pre- and post-emergence herbicide for control of broad-leaved weeds and annual grasses in barley, wheat, pastures, rangeland, and non-cropland; [HSDB]

Comments

An eye and mild skin irritant; Urea-derived herbicides have low toxicity in animal feeding studies; [HSDB] Systemic toxicity unlikely unless large amounts ingested; [EPA Pesticides, p. 122] In a 90-day feeding study at 5000 mg/kg diet, dogs had no apparent systemic toxicity; [HSDB]

Exposure Assessment
Vapor Pressure

5.8E-5 mm Hg

Lethal Concentration

LC50 (rat) > 5,000 mg/m3/4h

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Processes

Industrial Processes with risk of exposure: