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Common NameTralkoxydim
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中文通用名三甲苯草酮
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IUPAC(RS)-2-[(EZ)-1-(ethoxyimino)propyl]-3-hydroxy-5-mesitylcyclohex-2-en-1-one
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CAS2-[1-(ethoxyimino)propyl]-3-hydroxy-5-(2,4,6-trimethylphenyl)-2-cyclohexen-1-one
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CAS No.87820-88-0
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Molecular FormulaC20H27NO3
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Molecular Structure
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Physical PropertiesMolecular weight:329.4; Physical form:Colourless, odourless solid. Density:1.16 (25 °C); Composition:Tech. material is 92-95% pure. Melting point:106 °C; ( tech., 99-104 °C); Vapour pressure:3.7 × 10-4 mPa (20 °C, extrapolated); Henry constant:2 × 10-5 Pa m3 mol-1 (purified water); Partition coefficient(n-octanol and water):logP = 2.1 (20 °C, purified water); pKa:4.3 (25 °C); Solubility:In water 6 ( pH 5), 6.7 ( pH 6.5), 9800 ( pH 9) (all in mg/l, 20 °C). In hexane 18, methanol 25, acetone 89, ethyl acetate 110, toluene 213, dichloromethane >500 (all in g/l, 24 °C).; Stability:Stable >12 w (15-25 °C), 4 w (50 °C). DT50 (25 °C) 6 d ( pH 5), 113 d ( pH 7); after 28 d, 87% unchanged ( pH 9).;
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ToxicologyOral:Acute oral LD50 for male rats 1258, female rats 934, male mice 1231, female mice 1100, male rabbits >519 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Mild skin and eye irritant (rabbits). Not a skin sensitiser (guinea pigs). Inhalation: LC50(4 h) for rats >3.5 mg/l air. ADI:(Bayer) 0.08 mg/kg b.w.; ( JMPR ) 0.1 mg/kg b.w. [1988].
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Environmental ProfileEcotoxicology:
Algae: EC50 (120 h) for green algae 7.6 mg/l.Bees: LD50 (contact) >0.1 mg/bee; (oral) 0.054 mg/bee.Birds:Acute oral LD50 for mallard ducks >3020, partridges 4430 mg/kg. Dietary LC50 (5 d) for mallard ducks >7400, quail 6237 mg/kg diet.Daphnia: EC50 (48 h) >175 mg/l.Fish:LC50(96 h) for mirror carp >8.2, bluegill sunfish >6.1, rainbow trout >7.2 mg/l.Worms: LC50 (14 d) 87 mg/kg.Other aquatic spp.:EC50 (14 d) for Lemna gibba 1.0 mg/l.
Environmental fate:
Animals:Readily excreted from rats, as 4 different metabolites; no unchanged tralkoxydim is detected.Soil:Degrades rapidly in lab. soil studies; typical DT50 2-5 d (aerobic), 3 w (flooded soil). Primary metabolites are in turn extensively degraded; within 30 dat, up to 44% of applied radioactivity is liberated as CO -
Transport InformationSignal Word:CAUTION; Hazard Class:III(Slightly hazardous)
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