Cafenstrole

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Cafenstrole

中文通用名

唑草胺

IUPAC

N,N-diethyl-3-mesitylsulfonyl-1H-1,2,4-triazole-1-carboxamide

CAS

N,N-diethyl-3-[(2,4,6-trimethylphenyl)sulfonyl]-1H-1,2,4-triazole-1-carboxamide

CAS No.

125306-83-4

Molecular Formula

C₁₆H₂₂N₄O₃S

Molecular Structure

General Product Information

Category

Herbicides > Triazole herbicides
Herbicides > Amide herbicides

Activity

Herbicide.
Cafenstrole is active from pre-emergence to early post-emergence (three-leaf stage). It has residual activity lasting up to 50 days in paddy fields and 90-150 days in turf. The product shows very high selectivity for rice and turf. Selectivity in seeded rice is marginal and depends on the application timing.

In field trials in rice, cafenstrole gave better results (both in terms of weed control and residual activity) than pretilachlor.

Cafenstrole is safe to use for grass control in Zoysia turf (Zoysia japonicaand Z matrelia).

CropUse

Crop uses:
Transplanted rice, turf

Rice	210-300 g ai/ha
Turf	1,000-2,000 g ai/ha

Physical & Safety Data

Physical Properties

Molecular weight:350.5; Physical form:Colourless crystals. Density:1.30 (25 °C); Melting point:114-116 °C; Vapour pressure:5.3 ×10-5 mPa(20 °C); Partition coefficient(n-octanol and water):logP = 3.21; Solubility: In water 2.5 mg/l (20 °C).; Stability:Stable in neutral and weakly acidic media. Relatively stable to heat.

Toxicology

Oral:Acute oral LD₅₀ for rats and mice >5000 mg/kg. Percutaneous:Acute percutaneous LD₅₀for rats >2000 mg/kg. Inhalation:LC₅₀(14 d) for rats >1.97 g/m³. ADI:(JMPR) 0.0003 mg/kg[1991].

Environmental Profile

Ecotoxicology: Bees:Acute oral LC₅₀ (72 h) for bees >1000 ppm; contact LC₅₀ (72 h) >5000 ppm.Birds:Acute oral LD₅₀ for quail and mallard ducks >2000 mg/kg.Daphnia: LC₅₀(3 h) >500 mg/kg.Fish:LC₅₀ (48 h) for carp >1.2 mg/l. Environmental fate: Animals:The major metabolite in the rat and dog is 3-(2,4,6-trimethylphenylsulfonyl)-1,2,4-triazole.Soil:DT₅₀(Japanese paddy) c. 7 d, (Japanese upland) c. 8 d.Plant:The major metabolite in rice is the same as in the rat.
WATER SOLUBILITY: 2.5 mg/l (20°C)

Transport Information

Hazard Class:O (Obsolete as pesticide, not classified)