Phoxim

• O-(2 - Cyanobenzylidenamino ) - O, O- diethylthiophosphat
• O, O -diethyl- O-( alpha- cyanobenzylidenamino ) monothiophosphate
• ( Diethoxythiophosphoryloxyimino ) phenylacetonitrile

Yellow to reddish liquid

Liquid

1.18 g · cm -3

6.1 ° C

Decomposes on heating

2.1 MPa at 20 ° C.

• Very poor in water ( 7 mg · l-1 at 20 ° C)
• Readily soluble in many organic solvents

Attention

> 2 g · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Phoxim is an organic compound from the group of Thiophosphoric which is mainly used in veterinary medicine and the wood preservative used as an insecticide and acaricide. It is in the form of a yellow to reddish liquid.

History

Phoxim was placed in 1968 by Bayer under the name Baythion ® on the market. The authorization of plant protection products containing phoxim, was canceled in Europe on 21 June 2007.

Action principle

The effect of contact, feeding and respiratory poison based after metabolic desulfurization to the phosphoric esters on the inhibition of acetylcholinesterase. The two stereoisomers of Phoxims have varying degrees of effect as an insecticide. This affects the cis isomer - measured as the KT50 value - both as a contact and as a stomach poison faster on organisms such as house flies or larvae of the mosquito and the Common cutworm Mythimna separata than the trans isomer. The stereoselectivity varies in strength depending on the type; particularly pronounced she is with mosquito larvae.

Proof

Acute poisoning can be detected by Cholinesterasebestimmung or gas chromatography. The maximum permitted levels in tea and cereals as well as in other plant foods as amounting to maximum residue amount between 0.1 mg · kg Regulation -1 and 0.05 mg · kg -1.

Trade names

• Baythion ®
• Sebacil ®
• Valexon ®