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Common NameFenclorim
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中文通用名解草啶
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IUPAC4,6-dichloro-2-phenylpyrimidine
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CAS4,6-dichloro-2-phenylpyrimidine
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CAS No.3740-92-9
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Molecular FormulaC10H6Cl2N2
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Molecular Structure
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Category
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ActivityHerbicide Safener
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Physical PropertiesMolecular weight:225.1; Physical form:Colourless crystals. Density:1.5 g/cm3 (20 °C); Melting point:96.9 °C; Vapour pressure:12 mPa (20 °C); Henry constant:1.1 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 4.17; Solubility:In water 2.5 mg/l (20 °C). In acetone 14%, cyclohexanone 28%, dichloromethane 40%, toluene 35%, xylene 30%, hexane 4%, methanol 1.9%, n-octanol 4.2%, and isopropanol 1.8%.; Stability:Stable in neutral, acidic and weakly alkaline media. Stable up to 400 °C.;
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ToxicologyOral:Acute oral LD50 for rats >5000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Non-irritating to skin and eyes (rabbits). Sensitising to skin (guinea pigs). Inhalation: LC50 (4 h) for rats 2.9 mg/l air.
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Environmental ProfileEcotoxicology:
Algae: IC50 (5 d) for Scenedesmus subspicatus 20.9 ppm.Bees:Non-toxic to honeybees; LD50 (ingestion) >20 mg/bee; (contact) >1000 ppm.Birds:Acute oral LD50 for Japanese quail >500 mg/kg. LC50 for Japanese quail >10 000 ppm.Daphnia: LC50 (48 h) 2.2 ppm.Fish: LC50 (96 h) for rainbow trout 0.6, catfish 1.5 mg/l.Worms: LC50 (14 d) for earthworms >62.5 mg/ kg.
Environmental fate:
Animals:Rapidly absorbed, metabolised to polar compounds and excreted. No accumulation of residues in tissues.Soil:In soil, DT50 17-35 d. Fenclorim and its metabolites are strongly adsorbed onto soil.Plant:Readily metabolised to polar compounds. At harvest time, residues are negligible. -
Transport InformationHazard Class:III(Slightly hazardous)
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Acephate Pretilachlor Butachlor Niclosamide Fenclorim Fenpropimorph Difenoconazole Pyribenzoxim Metaldehyde Isoprothiolane