Metribuzin

Synonyms

1,2,4-Triazin-5-one, 4-amino-6-tert-butyl-3-(methylthio)-; 3-Methylthio-4-amino-6-tert-butyl-1,2,4-triazin-5-one; 4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one; 4-Amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5-one; 4-Amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one; 4-Amino-6-tert-butyl-3-methylthio-1,2,4-triazin-5(4H)-one; 4-Amino-6-tert-butyl-4,5-dihydro-3-methylthio-1,2,4-triazin-5-one; BAY 61597; BAY dic 1468; Bay 94337; Bayer 6159H; Bayer 6443H; Bayer 94337; DIC 1468; Lexone; Lexone 4L; Lexone DF; Metribuzin; Metribuzine; Metribuzine [ISO-French]; NTN 70; Sencor; Sencor 4F; Sencor DF; Sencorex; Sencorex L.F.; Senkor; Zenkor; [ChemIDplus]

Category

Herbicides, Triazine

Description

Colorless, crystalline solid. [herbicide]; [NIOSH]

Sources/Uses

Metribuzin is a herbicide used to control weeds in alfalfa, asparagus, barley, carrots, corn, peas, potatoes, soybeans, sugarcane, tomatoes, turf grass, and wheat. [ACGIH]

Comments

Classified as "slightly toxic" with an LD50 in rats of 1090 to 2300 mg/kg; [EXTOXNET] There are no known health effects in humans after occupational exposure. [ACGIH] For the triazine herbicides, systemic toxicity unlikely unless large amounts are ingested; May cause irritation; [EPA Pesticides, p. 121]

Reference Link #1

Biomedical References

Insufficient data

5 mg/m3

4E-07 mm Hg

Explanatory Notes

VP from HSDB;

Reference Link #2

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Not Classifiable

Processes

Industrial Processes with risk of exposure:

• Farming (Pesticides)