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Chemical Identification
Common Name
Sethoxydim
中文通用名
烯禾啶
IUPAC
(5RS)-2-[(EZ)-1-(ethoxyimino)butyl]-5-[(2RS)-2-(ethylthio)propyl]-3-hydroxycyclohex-2-en-1-one
CAS
2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one
CAS No.
74051-80-2
Molecular Formula
C17H29NO3S
Molecular Structure
Category
Activity
Herbicide
Premix
imazamox+imazethapyr+sethoxydim
Emulsifiable concentrate. Premix Parters: MCPB mefenacet;
Physical Properties
Molecular weight:327.5; Physical form:Oily, odourless liquid. Density:1.043 at 25 °C; Vapour pressure:<0.013 mPa; Partition coefficient(n-octanol and water):logP = 4.51 ( pH 5), 1.65 ( pH 7); Solubility:In water 25 ( pH 4), 4700 ( pH 7) (both in mg/l, 20 °C). Soluble in most common organic solvents e.g. acetone, benzene, ethyl acetate, hexane, methanol all >1 kg/kg (25 °C); Stability:The commercial product is stable for at least 2 y under normal storage conditions. At 10 mg/l, 12 h/d illumination with xenon lamp, DT50 is 5.5 d ( pH 8.7, 25 °C).;
Toxicology
Oral:Acute oral LD50 for male rats 3200, female rats 2676, male mice 5600, female mice 6300 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats and mice >5000 mg/kg. Non-irritating to skin and eyes (rabbits); no skin sensitisation. Inhalation: LC50 (4 h) for rats >6.28 mg/l air. Phytotoxicity:Non-phytotoxic to broad-leaved crops, but phytotoxic to most monocotyledonous crops (except onions, garlic, and asparagus).
Environmental Profile
Ecotoxicology: 
Bees:No significant hazard to bees.Birds:Acute oral LD50for Japanese quail >5000 mg/kg. Daphnia:LC50 (3 h) 1.5 mg/l.Fish:LC50 (48 h) for carp 153, trout 38 mg< tech./l. 

Environmental fate: 
Animals:In rats, following oral administration, 78.5% is eliminated in the urine and 20.1% in the faeces within 48 h.Soil:DT50 in soil <1 d at 15 °C. Metabolism involves molecular rearrangement, oxidation and conjugation processes.Plant:In soya beans, the parent molecule is oxidised, structurally rearranged, and conjugated. Transformation to metabolites is very rapid.
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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