杀虫剂的氯氰菊酯25%EC

Insecticide:Cypermethrin 25% EC Composition Tech. grade is 90% pure. Mol. wt. 416.3 M.f. C22H19Cl2NO3 Form Odourless crystals; (tech., yellow-brown viscous semi-solid at ambient temperatures). M.p. 61-83 , depending on isomer ratio V.p. 2.0 ?10-4 mPa (20 ) KOW logP = 6.6 Henry 2.0 ?10-2 Pa m3 mol-1 (calc.) S.g./density 1.24 (20 ) Solubility In water 0.004 mg/l (pH 7). In acetone, chloroform, cyclohexanone, xylene >450, ethanol 337, hexane 103 (all in g/l, 20 ). Stability Relatively stable in neutral and weakly acidic media, with optimum stability at pH 4. Hydrolysed in alkaline media; DT50 1.8 d (pH 9, 25 ); stable at pH 5 and 7 (20 ). Relatively stable to light in field situations. Thermally stable up to 220 . F.p. Not auto-flammable; non-explosive Uses: Control of a wide range of insects, especially Lepidoptera, but also Coleoptera, Diptera, Hemiptera, and other classes, in fruit (including citrus), vines, vegetables, potatoes, cucurbits, lettuce, capsicums, tomatoes, cereals, maize, soya beans, cotton, coffee, cocoa, rice, pecans, oilseed rape, beet, ornamentals, forestry, etc. Control of flies and other insects in animal houses; and mosquitoes, cockroaches, houseflies and other insect pests in public health. Also used as an animal ectoparasiticide. Compatibility Incompatible with alkaline materials.