Fenvalerate

• Fenvalerate
• Alpha- cyano-3- phenoxybenzylisopropyl - 4 - chlorophenylacetate

Yellowish solid

Fixed

1.17 g · cm -3

54-59 ° C.

Practically insoluble in water (1 mg · l-1 at 20 ° C)

Risk

• 70.2 mg · kg -1 ( LD50, rat, oral)
• 2500 mg · kg -1 ( LD50, Rabbit, transdermal)

Template: Infobox chemical / molecular formula search available

Fenvalerate is a chemical compound from the group of nitriles and pyrethroids.

Production and representation

Fenvalerate can be obtained from 4- chlorotoluene by a multi- stage production process starting, which is reacted with isopropyl bromide, among others. The technical product is a racemic mixture of the four isomers in equal proportions, and contains about 90-94 % fenvalerate.

Properties

Fenvalerate is a combustible yellowish solid which is practically insoluble in water. When heated above 150 ° C., a decomposition with the formation of toxic, corrosive fumes ( hydrogen chloride, hydrogen cyanide ). The compound is stable with respect to light, air, heat and moisture. Under UV light, there is rapid decomposition.

Use

Fenvalerate is used as an insecticide and acaricide. There is, for example, in fruit growing against biting and sucking insects, against leaf miners, codling moth and spider mites, applied in maize against corn borers and viticulture against grape and Spring worm.

In contrast to esfenvalerate ( this includes only the individual as an active ingredient active isomer of the racemate fenvalerate ) is in Germany, Austria and Switzerland, no pesticides approved that contains this ingredient.

Safety

Fenvalerate has been shown in animal experiments a carcinogenic effect.

Weblink

• WHO: fenvalerate