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Fenvalerate

Fenvalerate

IUPAC name	(RS)-alpha-Cyano-3-phenoxybenzyl (RS)-2-(4-chlorophenyl)-3-methylbutyrate
Identifiers
CAS number	51630-58-1
PubChem	3347
RTECS number	CY 1576350
SMILES	CC(C)C(C1=CC=C (C=C1)Cl)C(=O)OC(C#N)C2=CC (=CC=C2)OC3=CC=CC=C3
Properties
Molecular formula	C₂₅H₂₂C1NO₃
Molar mass	419.9 g/mole
Appearance	Yellow-brown viscous liquid
Density	1.175 g/cm³
Solubility in water	2 μg/L
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Fenvalerate is an insecticide. It is a mixture of four optical isomers which have different insecticidal activities. The 2-S alpha (or SS) configuration is the most insecticidally active isomer. Fenvalerate consists of about 23% of this isomer.

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Fenvalerate is an insecticide of moderate mammalian toxicity. In laboratory animals, central nervous system toxicity is observed following acute or long-term exposure. Fenvalerate has applications against a wide range of pests. Residue levels are minimized by low application rates. Fenvalerate is most toxic to bees and fish. It is found in some emulsifiable concentrates, ULV, wettable powders, slow release formulations, insecticidal fogs, and granules. It is most commonly used to control insects in food, feed, and cotton products, and for the control of flies and ticks in barns and stables. Fenvalerate does not affect plants, but is active for an extended period of time.

Fenvalerate may irritate the skin and eyes on contact, and is also harmful if swallowed.