Product Name:Beta-cypermethrin 10% SC

Item No.: 52315-07-8

Description: 

Beta-cypermethrin

Insecticide

pyrethroid

NOMENCLATURE

Common name beta-cypermethrin (BSI, draft E-ISO)

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

Chemical Abstracts name cyano(3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate; 2 parts of enantiomer pair [(1R)-1a(S*),3a] and [(1S)-1a(R*),3a] with 3 parts of enantiomer pair [(1R)-1a(S*),3b] and [(1S)-1a(R*),3b] 

Other names asymethrin* (rejected common name proposal) 

CAS RN [52315-07-8]   

PHYSICAL CHEMISTRY

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). 

Stability Stable to 150 ºC; to air and sunlight; in neutral and slightly acidic media; epimerised in presence of base, hydrolysed in strongly alkaline media. DT50 (extrapolated) 50 d (pH 3, 5, 6), 40 d (pH 7), 20 d (pH 8), 15 d (pH 9) (all at 25 ºC). 

APPLICATIONS

Biochemistry Acts on the nervous system of insects, disturbs the function of neurons by interaction with the sodium channel. 

Mode of action Non-systemic insecticide with contact and stomach action. 

Uses

It 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. 

Formulation types CS; EC; ME; SC; UL; gel. 

Selected tradenames: 'Chinmix' 'Peststop-B' ;