95% beta-cypermethrin TC IUPAC name：Roth: A reaction mixture comprising two enantiomeric pairs in ratio c. 2:3

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 and

(R)- a-cyano-3-phenoxybenzyl (1S)-cis-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate

with (S)- a-cyano-3-phenoxybenzyl (1R)-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate and

(R)- a-cyano-3-phenoxybenzyl (1S)-trans-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]

Chemical Structure:

M.f.：C₂₂H₁₉Cl₂NO₃

Mol. wt.：416.3

CAS RN：[52315-07-8] (undefined stereochemistry, also used for cypermethrin);

[72204-43-4] ([(1S)-1a (R*),3a] isomer; Roth: (S) (1R)-cis- isomer); [65731-84-2] ([(1R)-1a (S*),3a] isomer;

Roth: (R) (1S)-cis- isomer); [83860-31-5] ([(1S)-1a(R*),3b] isomer; Roth: (S) (1R)-trans- isomer);

[65732-07-2] ([(1R)-1a (S*),3b] isomer; Roth: (R) (1S)-trans- isomer)

Physical Chemistry：Form Tech. forms colourless or pale yellow crystals. M.p. 64-71℃ (peak 67 ℃), V.p. 1.8×10-4 mPa (20℃)KOW logP >4.7 (pH 7)S.g./density1.32 g/ml (theoretical), 0.66 g/ml (crystal powder) (20℃)Solubility In water 51.5 (5℃), 93.4 (25℃), 276.0 (35℃) (all inmg/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℃).Stability Stable to 150℃; to air and sunlight; in neutral and slightly acidic media; epimerised in presence of base, hydrolysed in strongly alkaline media.

Applications：Acts on the nervous system of insects, disturbs the function of neurons by interaction with the sodium channel.Non-systemic insecticide with contact and stomach action. 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.

Toxicology：Oral Acute oral LD50 for female rats 166, male rats 178, female mice 48, male mice 43 mg/kg.Skin and eye Acute percutaneous LD50 for rats >5000 mg/kg; mild skin and eye irritant (rabbits); non-sensitising to skin (guinea pigs).Inhalation LC50 (4 h) for rats >1.97 mg/l. Birds Acute oral LD50 for quail 8030, pheasants 3515 mg 5% a.i. formulation/kg. LC50 (8 d) for pheasants and quail >5000 mg 5% a.i. formulation/kg diet.Fish LC50 (96 h) for carp 0.028, catfish 0.015, grass carp 0.035 mg 5% a.i. formulation/l. Fish are not harmed under normal field conditions.Daphnia LC50 (96 h) 0.00026 mg 5% a.i. formulation/l. Bees LD50 (oral, 48 h) 0.0018 mg a.i./bee (as 5% formulation); (contact, 24 h) 0.085 l/ha (as 5% formulation); but not harmful at normal rate under field conditions.

Specification：95%TC

Packing：25kg in fibre drum