Theta-cypermethrin

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Theta-cypermethrin

中文通用名

高效反式氯氰菊酯

IUPAC

A mixture of the enantiomers (R)-a-cyano-3-phenoxybenzyl (1S,3R)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate and (S)-a-cyano-3-phenoxybenzyl (1R,3S)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate in the ratio 1:1 : (R)-a-cyano-3-phenoxybenzyl (1S)-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate and (S)-a-cyano-3-phenoxybenzyl (1R)-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate

CAS

[1a(S*),3b]-(?-cyano(3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate

CAS No.

71697-59-1

Molecular Formula

C₂₂H₁₉Cl₂NO₃

Molecular Structure

General Product Information

Category

Insecticides > Pyrethroid insecticides

Activity

Insecticide

Physical & Safety Data

Physical Properties

Molecular weight:416.3; Physical form:White crystalline powder. Density:1.33 g/ml (theoretical), 0.66 g/ml (crystal powder) (20 °C); Composition:Racemic cypermethrin isomer pair consisting of (S) (1R)-trans and (R) (1S)-trans isomers in 1:1 ratio. Tech. contains >95% (normally >97%) relevant stereoisomers. Melting point:81-87 °C (peak 83.3 °C), by ; Vapour pressure:1.8 × 10-4 (20 °C); Solubility:In water 114.6 mg/l ( 7, 25 °C). In isopropyl alcohol 18.0, di-isopropyl ether 55.0, hexane 8.5 (all in /ml, 20 °C).; Stability:Stable up to 150 °C. In water, 50 (extrapolated) 50 d ( 3, 5, 6), 20 d ( 7), 18 d ( 8), 10 d ( 9) (all at 25 °C).;

Toxicology

Oral:Acute oral 50 for male rats 7700, female rats 3200-7700, male mice 136, female mice 106 /. Percutaneous:Acute percutaneous 50 for rats >5000 /kg. Slight skin and eye irritant (rabbits); not a skin sensitiser (guinea pigs). ADI:0.05 /.

Environmental Profile

WATER SOLUBILITY: Insoluble

Transport Information

Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)