Title: Cyhalothrin
CAS Registry Number: 68085-85-8
CAS Name: 3-(2-Chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethylcyclopropanecarboxylic acid cyano(3-phenoxyphenyl)methyl ester
Trademarks: Grenade (Zeneca)
Molecular Formula: C23H19ClF3NO3
Molecular Weight: 449.85
Percent Composition: C 61.41%, H 4.26%, Cl 7.88%, F 12.67%, N 3.11%, O 10.67%
Literature References: Synthetic pyrethroid insecticide. Prepn: R. K. Huff, DE 2802962; idem, US 4183948 (1977, 1980 both to ICI). Activity: P. D. Bently et al., Pestic. Sci. 11, 156 (1980); V. K. Stubbs et al., Aust. Vet. J. 59, 152 (1982). Review of toxicology and human exposure: Toxicological Profile for Pyrethrins and Pyrethroids (PB2004-100004, 2003) 332 pp.
Properties: Commercial product exists as a mixture consisting of 95% cis-isomers.
Use: Insecticide; acaricide.
Cyheptamide Cyhexatin Cymarin Cymarose Cymene

Cyhalothrin structure.png
CAS number 68085-85-8
PubChem 5281873
ChemSpider 4445166
KEGG C10983 YesY
ATCvet code QP53AC06
Jmol-3D images Image 1
Molecular formula C23H19ClF3NO3
Molar mass 449.850 g/mol
Appearance Dark brown/green solid. Colorless when pure.
Density 1.33 ± 0.03 g/cm3 at 25 °C
Melting point 49.2°C
Boiling point 498.9°C decomp. (760 mmHg)
Solubility in water Very soluble in xylene. Soluble in ethyl acetate, diethyl eter, cyclohexane, methanol. Insoluble in water (0.005 mg/l (20°C)).
EU classification Toxic T Irritant Xi
NFPA 704
NFPA 704.svg
Flash point 185 °C; 365 °F; 458 K
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Cyhalothrin is an organic compound that is used as a pesticide.[1] It is a pyrethroid, a class of man-made insecticides that mimic the structure and insecticidal properties of the naturally-occurring insecticide pyrethrum which comes from the flowers of chrysanthemums. Synthetic pyrethroids, like lambda-cyhalothrin, are often preferred as an active ingredient in insecticides because they remain effective for longer periods of time. It is a colorless solid, although samples can appear beige, with a mild odor. It has a low water solubility and is nonvolatile. It is used to control insects in cotton crops.[2]