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Common NameDiflufenican
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中文通用名吡氟酰草胺
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IUPAC2′,4′-difluoro-2-(α,α,α-trifluoro-m-tolyloxy)nicotinanilide
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CASN-(2,4-difluorophenyl)-2-[3-(trifluoromethyl)phenoxy]-3-pyridinecarboxamide
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CAS No.83164-33-4
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Molecular FormulaC19H11F5N2O2
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Molecular Structure
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Category
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ActivityDiflufenican is a synthetic chemical belonging to the group carboxamide. It acts as residual and foliar herbicide that can be applied pre-emergence and post-emergence. Diflufenican is a contact, selective herbicide used to specifically control some broad leaved weeds, like Stellaria media (Chickweed), Veronica Spp (Speedwell), Viola spp , Geranium spp (Cranesbill) and Laminum spp (Dead nettles). The mode of action of diflufenican is a bleaching action, due to the inhibition of carotenoid biosynthesis, theregy preventing photosynthesis and leading to plant death.
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CropUse
Lupins, plantations, rye, triticale, winter barley and winter wheat.
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Weed SpectrumBroadleaf weeds: Stellaria media, Veronica spp., Viola spp., Laminum spp.
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FormulationOD = Oil dispersion
SC = Suspension concentrate (=flowable concentrate) -
PremixPyrazosulfuron-ethyl+Diflufenican
Flufenacet+Diflufenican+Flurtamone
Flufenacet+diflufenican
Diflufenican+Oxyfluorfen
DIFLUFENICAN+MCPA ETHYL HEXYL ESTER
diflufenican+lodosulfuron-methyl sodium
Diflufenican+isoproturon
DIFLUFENICAN+BROMOXYNIL OCTANOATE
pendimethalin, mecoprop-P, chlorotoluron, bromoxynil and ioxynil sodium, flufenacet, flurtamone, iodosulfuron Methyl sodium, glyphosate, oxadiazon, isoproturon,mcpa, mesosulfuron-methyl, isoproturon, mesosulforon-methyl 9 + iodosulfuron-methyl-sodium + mefenpyr, ioxynil sodium + isoproturon
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Physical PropertiesMolecular weight:394.3. Physical form:Colourless crystals. Composition: 97% pure. Melting point:159-161 °C; Vapour pressure:4.25×10-3 mPa (25 °C, gas saturation method),0.07 mPa (30°C).; Henry constant:0.033 Pa m3 mol-1; Partition coefficient(n-octanol and water):logP = 4.9; Solubility:In water <0.05 mg/l (25 °C). Soluble in most organic solvents, e.g. acetone, dimethylformamide 100, acetophenone, cyclohexanone 50, isophorone 35, xylene 20, cyclohexane, 2-ethoxyethanol, kerosene <10 (all in g/ kg, 20 °C); Stability:Stable in air up to melting point. At 22 °C, very stable in aqueous solution at pH 5, 7 and 9. Fairly stable to photolysis.
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ToxicologyOral:Acute oral
LD50 for rats >2000 mg/kg, mice >1000 mg/kg, rabbits >5000 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Non-irritating to skin and eyes (rabbits). Inhalation: LC50 (4 h) for rats >2.34 mg/l air. Phytotoxicity:Any slight phytotoxicity is in the form of small transient patches on basal leaves, with no adverse effect on crop develop -
Environmental ProfileEcotoxicology:
Algae:No growth inhibition of algae (96 h) at 10mg/l.Bees:Non-toxic by ingestion or contact.Birds:Acute oral LD50 for quail >2150, mallard ducks >4000 mg/kg.Daphnia: LC50 (48 h) - no effect at 10 mg/l.Fish: LC50 (96 h) for rainbow trout 56-100, carp 105 mg/l.Worms:Non-toxic to earthworms.
Environmental fate:
Soil:In soil, degradation proceeds via the metabolites 2-(3-trifluoromethylphenoxy)nicotinamide and 2-(3-trifluoromethylphenoxy)nicotinic acid to bound residues and CO2. Half-life varies from 15 to 30 weeks, depending on soil type and water content.Plant:In cereals, rapidly metabolised via the nicotinamide and nicotinic acid to CO2. Following pre-emergence application in autumn, no residues are detectable in the grain and straw after c. 200-250 days.
WATER SOLUBILITY: 0.05 mg/l at 25°C. -
Transport InformationSignal Word:CAUTION; Hazard Class:III (Slightly hazardous)
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