cypermethrin
Common namecypermethrin
IUPAC name：(RS)- a-cyano-3-phenoxybenzyl (1RS,3RS;1RS,3SR)-3-(2,2-dichlorovinyl)
-2,2-dimethylcyclopropanecarboxylate
Roth: (RS)- a-cyano-3-phenoxybenzyl (1RS)-cis-trans-3-(2,2-dichlorovinyl)
-2,2-dimethylcyclopropanecarboxylate
Chemical Abstracts namecyano(3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)
-2,2-dimethylcyclopropanecarboxylate
Chemical Structure:
M.f.：C22H19Cl2NO3
Mol. wt.：416.3
CAS RN：[52315-07-8]
Physical Chemistry：Form Odourless crystals; (tech., yellow-brown viscous semi-solid at ambient temperatures).M.p. 61-83℃, depending on isomer ratioV.p. 2.0×?10-4 mPa (20℃)KOW logP = 6.6Henry 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℃.
Applications：Non-systemic insecticide with contact and stomach action. Also exhibits anti-feeding action. Good residual activity on treated plants. 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.
Toxicology：Oral Acute oral LD50for rats 250-4150 (tech. 7180), mice 138 mg/kg.Skin and eye Acute percutaneous LD50 for rats >4920, rabbits >2460 mg/kg. Slight skin and eye irritant (rabbits). Inhalation LC50 (4 h) for rats 2.5 mg/l. Birds Acute oral LD50 for mallard ducks >10 000, chickens >2000 mg/kg.Fish LC50 (96 h) for rainbow trout 0.69mg/l; under field conditions, fish are not at risk from normal agricultural usage.Daphnia LC50 (48 h) 0.15 mg/l.Bees Highly toxic to honeybees in laboratory tests, but field applications at recommended dosages do not put hives at risk. LD50 (24 h) (oral) 0.035mg/bee; (topical) 0.02mg/bee.
Specification：95%TC
Packing：200kg in iron drum
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