Silafluofen

• Silonen
• (4- ethoxyphenyl ) [3 - (4- fluoro-3- phenoxyphenyl) propyl] dimethylsilane
• Neophan
• Joker
• Silatop

Colorless or yellowish oily liquid

Liquid

1.08 g · cm -3

Decomposes

Insoluble in water ( 0.001 mg · l-1 at 20 ° C)

Attention

• > 5000 mg · kg -1 ( LD50, rat, oral)
• > 5000 mg · kg -1 ( LD50, Rabbit, transdermal)

Template: Infobox chemical / molecular formula search available

Silafluofen is a chemical compound from the group of pyrethroid ether, which was found in Japan in 1984 by Yoshio Katsuda. 1991 silafluofen was first approved in Japan. It is much less toxic to fish than the other pyrethroids.

Production and representation

Silafluofen can be represented by a multi-step reaction. First 3-chloro -4-fluoro nitroaniline and sodium nitrite are reacted, the product is then brominated with hydrogen bromide and copper ( II) bromide. The product now reacts with the Grignard reagent 3- bromopropene. After 4- Ethoxyphenyldimethylsilan is added in the presence of Hexachloridoplatinsäure. The intermediate then reacts with sodium to the final product.

Use

In Japan silafluofen has been used since 1995 as a pesticide in different cultures. For fish, it is less toxic than other pyrethroids, which is particularly important in wet rice cultivation is important. Silafluofen is used as an insecticide and termiticide especially in wood preservation. It is suitable for it because of its stability against degradation in the soil, by sunlight or by bases.

Admission

The active ingredient silafluofen was never approved in the EU for plant protection products. In Germany, Austria and Switzerland, no plant protection products containing this active ingredient are allowed.