Azimsulfuron

Favorites

Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Azimsulfuron

中文通用名

四唑嘧磺隆

IUPAC

1-(4,6-dimethoxypyrimidin-2-yl)-3-[1-methyl-4-(2-methyl-2H-tetrazol-5-yl)pyrazol-5-ylsulfonyl]urea

CAS

N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-1-methyl-4-(2-methyl-2H-tetrazol-5-yl)-1H-pyrazole-5-sulfonamide

CAS No.

120162-55-2

Molecular Formula

C₁₃H₁₆N₁₀O₅S

Molecular Structure

General Product Information

Category

Herbicides > Sulfonylurea Herbicides
Herbicides > Pyrazole herbicides

Activity

Herbicide.
Azimsulfuron is a post-emergence herbicide for the control of annual and perennial broadleaf weeds and sedges and barnyard grass (Echinochloa spp). The product is suitable for use in all rice cultivation systems. Azimsulfuron is particularly suitable for foliar application: since uptake by roots is less efficient than uptake by leaves and shoots. The product is translocated in the xylem and phloem and weeds are killed within three weeks of application. DuPont recommends applications from GS 14 to GS 21-23 of rice/1-4 leaf stage of Echinochloa. The use of surfactants enables optimum control of Echinochloa spp at the lower application rate.

The company recommend application into a very low flood (1-2 cm water) which should be maintained for 3-4 days after application.

In field trials, azimsulfuron gave similar control of Echinochloa spp to quinclorac + bensulfuron-methyl, but at much lower application rates. The reduction in application rate was even more marked by comparison with older herbicide products.

CropUse

Crop uses:
rice

Rice	20-25 g ai/ha

Physical & Safety Data

Physical Properties

White powdery solid; Molecular weight: 424.4 g/mol; Melting Point: 170℃.

Toxicology

(Rat): Oral LD₅₀ >5000 mg/kg. Dermal LD₅₀ >2000 mg/kg. Inhalation LC₅₀ (4 h) >5.9 mg/l.

Environmental Profile

HAZARDS: Fish: LC₅₀ (96 h) >300 ppm (carp); >1000 ppm (bluegill sunfish); 154 ppm (rainbow trout). LC₅₀ (48 h) >1000 ppm (Daphnia). Bird: LD₅₀ >2250 mg/kg (bobwhite quail, mallard duck). Dietary LC₅₀ (8 d) >5260 mg/kg (bobwhite quail, mallard duck). Bee: LD₅₀ (48 h) (Oral) >25μg/bee; (Contact) >1000μg/bee.

Bluegill sunfish _{[96 hrs]}	LC₅₀ >1,000 mg/litre
Bobwhite quail	LD₅₀ >2,250 mg/kg
Rainbow trout _{[96 hrs]}	LC₅₀ >154 mg/litre
Mallard duck	LD₅₀ >2,250 mg/kg
Daphnia magna _{[48 hrs]}	EC₅₀ 941 mg/litre
Bee contact	LD₅₀ >25 μg/bee
Bee ingestion	LD₅₀ >1000 μg/bee

Fate in soil:
Azimsulfuron is degraded by microbial and chemical pathways in soil. Bio-accumulation in soil is not expected. The half-life in paddy soils is 11-24 days. Azimsulfuron has intermediate mobility in soil.

Fate in aquatic systems:
Azimsulfuron is degraded in water by hydrolysis and by indirect photolysis (as a result of the action of light on other constituents in paddy water). The half-life is dependent on pH and ranges from 103 days at low pH to 225 days at higher pH.

Transport Information

Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)