Oxydemeton-methyl

• (±)- S-(2 - Ethylsulfinylethyl )-O, O- dimethyl thiophosphate
• (±)- O, O -dimethyl -S -(3- oxo-3- thiapentyl ) monothiophosphate
• DL -S -(2- Ethylsulfinylethyl )-O, O- dimethyl thiophosphate
• (RS )-S- (2- Ethylsulfinylethyl )-O, O- dimethyl thiophosphate
• Demeton -S- sulfoxide
• Metasystox

Colorless liquid

Liquid

1.29 g · cm -3

<-20 ° C

106 ° C ( 1.3 Pa )

Soluble in water

Risk

30 mg · kg -1 ( LD50, rat, oral)

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Oxydemeton -methyl (often in the misspelling Oxydemethon -methyl) is a chemical compound of the groups of substances Thiophosphoric and the sulfoxides. It is classified as toxic and dangerous for the environment. Oxydemeton -methyl is a cholinesterase inhibitor, acts as a systemic insecticide and was brought by Bayer AG in 1960 to the market.

Use

Oxydemethon -methyl is used as a systemic insecticide and acaricide. It is used for control of spider mites, aphids, sawflies, leaf fleas and other sucking insects.

Isomerism

As unbalanced sulfoxide oxydemeton -methyl has a chiral center at the sulfur atom of the sulfoxide group is therefore chiral. Therefore there are two enantiomers, (R)- oxydemeton -methyl, and the mirror-image to (S)- oxydemeton -methyl. Oxydemeton -methyl is used as a racemic mixture [ 1:1 mixture of (R)- oxydemeton -methyl and (S)- oxydemeton - methyl].