Captan

• N- Trichlormethylmercapto -4 -cyclohexene -1 ,2- dicarboximide
• 1,2,3,6 -tetrahydro- N-( trichloromethylthio ) phthalimide
• N-( trichloromethylthio ) cyclohex -4-ene -1 ,2- dicarboximide
• 3a, 4,7,7 a -tetrahydro- 2-( trichloromethylthio ) isoindole- 1 ,3-dione

White to yellow solid with faint odor mercaptanartigem

Fixed

1.74 g · cm -3

Practically insoluble in water (< 0.5 mg · l-1 at 25 ° C)

Risk

• 9000 mg · kg -1 ( LD50, rat, oral)
• > 5000 mg · kg -1 ( LD50, rat, transdermal)

Template: Infobox chemical / molecular formula search available

Captan is a chemical compound selected from the group consisting of phthalimides.

Production and representation

Captan can be obtained in the presence of sodium hydroxide by the reaction of 1,2,3,6- tetrahydrophthalimide with trichloromethanesulfenyl chloride ( Perchlormethylmercaptan ).

Properties

Captan is a flammable white to yellow (technical product) solid with weak mercaptanartigem odor, which is practically insoluble in water. It decomposes when heated and slowly hydrolyzed under neutral and rapidly under basic conditions.

Use

Captan is used as an active ingredient in pesticides. It is used as a fungicide against a number of diseases. Captan was approved in March 1949 in the United States for the first time. There, over 1400 t captan above all in vineyards and orchards are used annually.

The active substance captan was approved in the European Union with effect from 1 October 2007 for use as fungicide.

In Germany, Austria and Switzerland pesticides are authorized (eg Malvin, Merpan ) with this drug.