Omethoate

• O, O- dimethyl S-( N- methylcarbamoyl ) methylthiophosphat
• Folimat
• Dithiophosphoric acid O, O -dimethyl- S-( 2 - ( methylamino) -2-oxo -ethyl ) ester

Colorless liquid with an odor mercaptanartigem

Liquid

1.32 g · cm -3

-28 ° C

135 ° C ( decomposition)

3.3 MPa (20 ° C)

• Miscible with water
• Soluble in alcohol and acetone

1.4987 (20 ° C)

Risk

• 30 mg · kg -1 ( LD50, rat, oral)
• 700 mg · kg -1 ( LD50, rat, transdermal)

Template: Infobox chemical / molecular formula search available

Omethoate is a chemical compound from the group of carboxylic acid amides and Thiophosphoric.

Production and representation

Omethoate, by reaction of O, O- Dimethylphosphorylmercaptoessigsäure be with methyl isocyanate or by reaction of O, O- Dimethylthiophosphorsäure made ​​with 2-chloro- N- methylacetamide.

Properties

Omethoate is a flammable, low volatile, oily, colorless liquid with mercaptanartigem odor, miscible with water. It decomposes on heating above 135 ° C. Omethoate slowly hydrolysed in acidic and under basic conditions faster.

Use

Omethoate is used as an insecticide. It was approved in the German Democratic Republic 1976-1994 and in Germany 1971-1998. It is a metabolite and P = O analogue ( oxon ) of dimethoate and acts by inhibiting acetylcholinesterase.

Omethoate was not included in the list of allowable pesticide active substances in Annex I to Directive 91/414/EEC, 2002. In Germany, Austria and Switzerland, no plant protection products containing this active ingredient are allowed.