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Common NameTriasulfuron
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中文通用名醚苯磺隆
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IUPAC1-[2-(2-chloroethoxy)phenylsulfonyl]-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea
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CAS2-(2-chloroethoxy)-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamide
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CAS No.82097-50-5
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Molecular FormulaC14H16ClN5O5S
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Molecular Structure
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Category
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CropUsePre-emergence or post-emergence in wheat, barley to control broadleaf weeds and grassy weeds.
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FormulationWP = Wettable powder
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PremixTriasulfuron+isoproturon
Triasulfuron+dicamba
Triasulfuron+butafenacil
Premix Parters: anthraquinone fenpropimorph kresoxim-methyl triadimenol;
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Physical PropertiesPhysical form:Fine white powder. Density:1.5 g/cm3; Melting point:178.1 °C ( decomp.); Vapour pressure:<2 × 10-3 mPa (25 °C) ( OECD 104); Henry constant:<8 × 10-5 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 1.1 ( pH 5.0), -0.59 ( pH 6.9), -1.8 ( pH 9.0) (25 °C); pKa:4.64 (20 °C); Solubility:In water 32 ( pH 5), 815 ( pH 7), 13 500 ( pH 8.4) (all in mg/l, 25 °C). In acetone 14, dichloromethane 36, ethyl acetate 4.3 (all in g/l, 25 °C). In ethanol 420, n-octanol 130, 50 8.2 h ( pH 1), 3.1 y ( pH 7), 4.7 h ( pH 10).;
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ToxicologyOral:Acute oral LD50 for rats and mice >5000 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Mild skin irritant; non-irritating to eyes (rabbits). Non-sensitising to skin (guinea pigs). Inhalation: LC50 (4 h) for rats >5.18 mg/l air.
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Environmental ProfileEcotoxicology:
Algae: EC50 (5-14 d) for Selenastrum 0.035, Scenedesmus 0.77, Anabaena 1.7, Navicula >100 mg/l.Bees:Non-toxic to honeybees. LD50 (acute and contact) >100 µg/bee.Birds:Acute oral LD50 for quail and ducks >2150 mg/kg.Daphnia: LC50 (96 h) >100 mg/l.Fish: LC50 (96 h) for rainbow trout, carp, catfish, sheepshead minnow and bluegill sunfish >100 mg/l.Worms: LC50 (14 d) for earthworms >1000 mg/kg soil.Other aquatic spp.:EC50 (48 h) for Quahog clam 56 mg/l.
Environmental fate:
Animals:Mainly excreted in the urine in unchanged form.Soil:The degradation behaviour in soil is determined by the soil type, pH, and especially temperature and moisture content. Field studies with silty loam, clay loam and sandy loam showed a median DT50 19 d, dependingPlant:In wheat, metabolism is by hydroxylation (para to the sulfonyl urea bridge), followed by conjugation of various hydroxy metabolites with glucose.50 in forage c. 3 days. In straw and grain, no residues were d -
Transport InformationSignal Word:CAUTION; Hazard Class:III(Slightly hazardous)
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