Tetraethyl pyrophosphate

  • Tetraethyldiphosphat
  • TEPP
  • Bladan

Hygroscopic colorless liquid

Liquid

1.18 g · cm -3

0 ° C

124 ° C.

2.0664 Pa (° C)

Soluble in nonpolar solvents (acetone, benzene, chloroform)

1.4071

Risk

  • 0.5 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Tetraethyl, TEPP abbreviated is a chemical compound selected from the group of the phosphoric esters. It was developed as one of the first organic insecticides in 1938 by Gerhard Schrader.

An EU approval was never in Germany, Austria and Switzerland, no plant protection products containing this active ingredient are allowed.

Extraction

TEPP can be prepared from diethyl chlorophosphate and water under the presence of pyridine to scavenge the hydrogen chloride.

CAS registry number PubChem Vapor pressure Dangerous Substances Directive (67/548/EEC) Digital Object Identifier
766418
de