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Chemical Identification
Common Name
Difenoconazole
中文通用名
苯醚甲环唑
IUPAC
3-chloro-4-[(2RS,4RS;2RS,4SR)-4-methyl-2-(1H-1,2,4-triazol-1-ylmethyl)-1,3-dioxolan-2-yl]phenyl 4-chlorophenyl ether
CAS
1-[2-[2-chloro-4-(4-chlorophenoxy)phenyl]-4-methyl-1,3-dioxolan-2-ylmethyl]-1H-1,2,4-triazole
CAS No.
119446-68-3
Molecular Formula
C19H17Cl2N3O3
Molecular Structure
Category
Activity
Fungicide
Premix
Thiamethoxam+difenoconazole
Thiamethoxam+difenoconazole+fludioxonil+metalaxyl-M
Thiamethoxam+difenoconazole+metalaxyl-M
Chlorothalonil+difenoconazole
Azoxystrobin+difenoconazole
Difenoconazole+fludioxonil
Fludioxonil+azoxystrobin+difenoconazole
Mandipropamid+difenoconazole
Fludioxonil+difenoconazole+thiamethoxam
Imidacloprid+Fludioxonil+Difenoconazole
thiamethoxam+difenoconazole+metalaxyl-M+sedaxane+fludioxonil
difenoconazole+metalaxyl-M+sedaxane+fludioxonil
Difenoconazole+Propiconazole
Difenoconazole+Kresoxim-methyl
Prochloraz+Difenoconazole
Difenoconazole+Carbendazim
Difenoconazole+Sedaxane+Fludioxonil
Difenoconazole+Sedaxane+Fludioxonil
Difenoconazole+Fluxapyroxad
Pydiflumetofen+difenoconazole
Difenoconazole+Thifluzamide
ABAMECTIN+THIAMETHOXAM+DIFENOCONAZOLE
Difenoconazole+Bromothalonil
Difenoconazole+Trifloxystrobin
Difenoconazole+Metiram
Difenoconazole+Captan
Mancozeb+Difenoconazole
Difenoconazole+Pyrimidine nucleoside
Difenoconazole+Flusilazole
Difenoconazole+Dithianon
Fenaminstrobin+Difenoconazole+Thiamethoxam
Difenoconazole+Fenaminstrobin
Imidacloprid+Chlorpyrifos+Difenoconazole
Difenoconazole+Sulfur
Difenoconazole+Picoxystrobin
Foliar: emulsifiable concentrate, water dispersible concentrate, suspension concentrate. Seed treatment: water dispersible powder, flowable concentrate. Premix Parters: bromoxynil ioxynil; chlorotoluron; cyanazine; flurtamone; flurtamone isoproturon; isoproturon.
Physical Properties
Molecular weight:406.3. Physical form:White to light beige crystals. Density:1.40 (20 °C); Composition:Ratio of cis- to trans- isomers is in the range 0.7 to 1.5. Melting point:78.6 °C; Vapour pressure:3.3×10-5 mPa (25 °C); Henry constant:1.5×10-6 Pa m3 mol-1 ( calc.). Partition coefficient(n-octanol and water):logP = 4.20 (25 °C). Solubility:In water 15 mg/l (25 °C). In ethanol 330, acetone 610, toluene 490, n-hexane 3.4, n-octanol 95 (all in g/l, 25 °C). Stability:Stable up to 150 °C. Hydrolytically stable.
Toxicology
Oral:Acute oral LD50 for rats 1453, mice >2000 mg/kg. Percutaneous:Acute percutaneous LD50 for rabbits >2010 mg/kg. Non-irritant to eyes and skin (rabbits). Non-sensitising to skin (guinea pigs). Inhalation: LC50 (4 h) for rats 3300 mg/m3 air. Phytotoxicity:In wheat, early foliar applications at growth stages 29-42 might cause, in certain circumstances, chlorotic
Environmental Profile
Ecotoxicology: 
Algae: EC50 (72 h) for Scenedesmus subspicatus 1.2 mg/l.Bees:Non-toxic to honeybees; LD50 (oral) >187 µg/bee; LC50 (contact) >100 µg/bee.Birds: LD50 (9-11 d) for mallard ducks >2150 mg/kg. LC50 for bobwhite quail >4760, mallard ducks >5000 ppm.Daphnia: LC50 (48 h) 0.77 mg/l.Fish:50 (96 h) for rainbow trout 0.8, bluegill sunfish 1.2, sheepshead minnow 0.82 mg/l.Worms: LC50 for earthworms >610 mg/ kg.Other aquatic spp.: EC50 (96 h) for Eastern oysters 0.45 mg/l; (14 d) for Lemna gibba 18.5 mg/l. 
Environmental fate: 
Animals:After oral administration, difenoconazole was rapidly eliminated practically to entirety, with urine and faeces. Residues in tissues were not significant and there was no evidence for accumulation.Soil:Practically immobile in soil, strong adsorption to soil particles, low potential to leach below top soil layer. Soil dissipation rate is slow and dependent on application rate. DT50 for photolysis 145 d (natural sunlight).Plant:Two routes of metabolism: one by a triazole route to triazolylalanine and triazolylacetic acid; the other by hydroxylation of the phenyl ring followed by conjugation.
SOIL PARTICLE ADSORPTION: Low soil mobility by strong adsorption to soil particles.
WATER SOLUBILITY: 15 mg/l at 25° C.
Transport Information
Signal Word:CAUTION; Hazard Class:III (Slightly hazardous)

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