Common name beta-cypermethrin

IUPAC name Roth: A reaction mixture comprising two enantiomeric pairs in ratio c. 2:3 (S)-a-cyano-3-phenoxybenzyl (1R)-cis-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate

CAS RN [52315-07-8]    beta-cypermethrin

Mol. wt. 416.3 

M.f. C22H19Cl2NO3 

Form Tech. forms colourless or pale yellow crystals. 

M.p. 64-71 ºC (peak 67 °C), (varies with even small - 1% - change in isomer ratio) 

V.p. 1.8  10-4 mPa (20 ºC) 

KOW logP >4.7 (pH 7) 

S.g./density 1.32 g/ml (theoretical), 0.66 g/ml (crystal powder) (20 ºC) 

Solubility In water 51.5 (5 ºC), 93.4 (25 ºC), 276.0 (35 ºC) (all in mg/l, pH 7). In isopropanol 11.5, xylene 349.8, dichloromethane 3878, acetone 2102, ethyl acetate 1427, petroleum ether 13.1 (all in mg/ml, 20 ºC). 

Can be used against a wide range of insect pests in public health (e.g. flies, cockroaches, mosquitoes, fleas, lice, bugs) and in veterinary applications (ectoparasitic ticks and mites). In plant protection, it is effective against Coleoptera and Lepidoptera, and gives good protection against Orthoptera, Diptera, Hemiptera, and Homoptera. Mainly used in alfalfa, cereals, cotton, grapes, maize, oilseed rape, pome fruit, potatoes, soya beans, sugar beet, tobacco and vegetables.