Triphenyltin hydroxide

• Triphenyltin
• TPTH
• Brestan liquid

White solid with a slight aromatic odor

Fixed

1.54 g · cm -3

122 to 123.5 ° C

Insoluble in water ( 0.0012 g · l-1 at 20 ° C)

Risk

• 46 mg · kg -1 ( LD50, rat, oral)
• 1600 mg · kg -1 ( LD50, Rabbit, transdermal)

Template: Infobox chemical / molecular formula search available

Fentin hydroxide is a chemical compound from the group of organotin compounds. When heated above 45 ° C it is dehydrated to form bis ( triphenyltin ) oxide.

Production and representation

Fentin hydroxide can be recovered in a Grignard reaction followed by reaction with sodium hydroxide by the reaction of chlorobenzene with magnesium, tin (IV ) chloride.

Use

Fentin hydroxide was used as a fungicide, especially against the blight. It was approved in Germany 1971-2001.

The European Commission decided in 2002 not to include Fentin hydroxide because of the potential hazard to users and non-target organisms in the list of authorized active substances of plant protection products. In Germany, Austria and Switzerland, no plant protection products containing this active ingredient are allowed.