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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
Category
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 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)

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Jiangxi Anlida Chemical Co., Ltd.

Country:  China