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Common NameOxadiazon
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中文通用名噁草酮
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IUPAC5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-1,3,4-oxadiazol-2(3H)-one
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CAS3-[2,4-dichloro-5-(1-methylethoxy)phenyl]-5-(1,1-dimethylethyl)-1,3,4-oxadiazol-2(3H)-one
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CAS No.19666-30-9
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Molecular FormulaC15H18Cl2N2O3
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Molecular Structure
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Category
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ActivityHerbicide
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PremixPyrazosulfuron-ethyl+Pendimethalin+Oxadiazon
Pretilachlor+Oxadiazon+Clomazone
Oxadiazon+Simetryn
Oxadiazon+Oxyfluorfen+Pendimethalin
Oxadiazon+Butralin
Butachlor+Oxyfluorfen+Oxadiazon
Butachlor+oxadiazon
Bensulfuron-methyl+Pretilachlor+Oxadiazon
Anilofos+Oxyfluorfen+Oxadiazon
Emulsifiable concentrates, granules, flowable, wettable powder.
Premix Parters: beta-cyfluthrin;
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Physical PropertiesMolecular weight:345.2g/mol; Physical form:Colourless, odourless crystals. Composition:Tech. is 94% pure. Melting point:87℃; Vapour pressure:0.1 mPa (25 ℃); Henry constant:3.5 × 10-2 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 4.91 (20℃); Solubility:In water 1.0 mg/l (20 ℃). In methanol, ethanol c. 100, cyclohexane 200, acetone, isophorone, methyl ethyl ketone, carbon tetrachloride c. 600, toluene, benzene, chloroform c. 1000 (all in g/l, 20℃).; Stability:Stable in neutral or acidic medium, relatively unstable in alkali; DT50 38 d (pH 9, 25℃).
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ToxicologyOral:Acute oral LD50 for rats >5000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats and rabbits >2000 mg/kg. Slightly irritating to eyes; negligible irritant to skin (rabbits). Inhalation: LC50 (4 h) for rats >2.77 mg/l. Phytotoxicity:Carnations are tolerant of over-the-top, post-emergence application. Not to be used on red fescue, bentgrass turf, dichronda or centipedegrass.
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Environmental ProfileEcotoxicology: Algae: EC50 6-3000μg/l.Bees: LD50 >400μg/bee, with repellent effect. Mortality is negligible by direct contact at doses up to 27 kg a.i./8 ha.Birds:Acute oral LD50 (24 d) for mallard ducks >1000, bobwhite quail >2150 mg/ kg.Daphnia: EC50 (48 h) >2.4 mg/l.Fish: LC50 (96 h) for rainbow trout and bluegill sunfish 1.2 mg/l.Worms:Not toxic at recommended rate. Environmental fate: Animals:In mammals, following oral administration, 93% is eliminated within 72 hours, predominantly in the urine.Soil:Strongly adsorbed by soil colloids and humus, with very little migration or leaching. Negligible loss due to volatilisation. Half-life in soil is c. 3-6 mo. See D. Ambrosi et al., J. Agric. Food Chem., 1977, 25Plant:Oxadiazon penetrates plants primarily via shoots and leaves and is rapidly metabolised. Metabolites do not accumulate in the plant. WATER SOLUBILITY: Insoluble
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Transport InformationSignal Word:WARNING; Hazard Class:II(Moderately hazardous)
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