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Chemical Identification
Common Name
Sulcotrione
中文通用名
磺草酮
IUPAC
2-(2-chloro-4-mesylbenzoyl)cyclohexane-1,3-dione
CAS
2-[2-chloro-4-(methylsulfonyl)benzoyl]-1,3-cyclohexanedione
CAS No.
99105-77-8
Molecular Formula
C14H13ClO5S
Molecular Structure
Category
Activity
Herbicide

Sulcotrione is primarily a systemic, post-emergence herbicide. However, it also has some residual soil activity, remaining in the top layer of the soil to be activated by rainfall. Grass weeds are best controlled with early post-emergence applications. Plant death occurs within ten days of treatment. The product has shown no cross-resistance to atrazine-resistant species. Sulcotrione may be used for pre-emergence applications in flax. No visible injury or negative effects on yield have been noted.

Sulcotrione is selective to maize and sugar cane.
CropUse
CropUses:
maize, sugar canes, flax

Maize: 300-450 g ai/ha

Flax: 600 g ai/ha

Premix
Premix Parters: propanil; pyrazosulfuron-ethyl;

Type

AI concn

Suspension concentrate (SC)

30% (w/v)

Physical Properties
Molecular weight:328.8; Physical form:White solid; (tech. is a light tan solid). Composition:Tech. material is 90% pure. Melting point:139 °C; (tech., 131-139 °C); Vapour pressure:5 × 10-3 mPa (25 °C); Henry constant:9.96 × 10-6 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP <0 (unspecified pH); pKa:3.13 (23 °C); Solubility:In water 165 mg/l (25 °C). Soluble in acetone and chlorobenzene.; Stability:Stable in water, with or without exposure to sunlight. Thermostable up to 80 °C.;
Toxicology
Oral:Acute oral LD50 for rats >5000 mg/kg. Percutaneous:Acute percutaneous LD50 for rabbits >4000 mg/kg. Low rate of absorption through the skin; non-irritating to skin; mild eye irritant (rabbits). Strong skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) >1.6 mg/l.
Environmental Profile
Ecotoxicology:?
Algae:EC50 (96 h) for Selenastrum capricornutum 1.2 mg/l.Bees:Low toxicity to bees, both by topical and oral application; LD50 >200 μg/bee.Birds:Dietary LC50 for bobwhite quail and mallard ducks >5620 mg/ kg.Daphnia: LC50 (48 h) >200 mg/l.Fish: LC50 (96 h) for rainbow trout 227, mirror carp 240 mg/l.Worms: LC50 (14 d) >1000 mg/kg soil.?

Environmental fate:?
Animals:Rapidly excreted in the urine, the major metabolite being 4-hydroxysulcotrione.Soil:Rapidly degraded in soil; lab. DT50 15-74 d; field DT50 1-11 d. The major metabolite is 2-chloro-4-methylsulfonylbenzoic acid.Koc 44 (high pH, sandy clay lPlant:Deactivated by the formation of 2-chloro-4-methylsulfonylbenzoic acid.

Mallard duck

LD50 >1,350 mg/kg Bobwhite quail LD50 >2,250 mg/kg

Mirror carp [96 hrs]

LC50 240 mg/litre Daphnia [48 hrs] LC50 100 mg/litre

Rainbow trout [96 hrs]

LC50 227 mg/litre Bee [contact] LD50 >200mg/bee

Fate in :

Fate in soil:
Sulcotrione is primarily degraded by microbes. The half-life in soil is typically 10-15 days in the field.

Fate in aquatic systems:
Sulcotrione degrades in water.

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

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