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QL (chemical)




IUPAC nameExpression error: Unexpected > operator.
Other names
Isopropyl aminoethylmethyl phosphonite, O-(2-diisopropylaminoethyl) O'-ethyl methylphosphonite
Abbreviations QL
ChemSpider 148925
Jmol 3D model Interactive image
PubChem 170325
Molar mass 235.303
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Isopropyl aminoethylmethyl phosphonite (NATO designation QL), also known as O-(2-diisopropylaminoethyl) O'-ethyl methylphosphonite, is a precursor chemical to the nerve agent VX.

Uses in chemical warfare

QL is a component in binary chemical weapons, mainly VX nerve agent.[1] It, along with Methylphosphonyl difluoride (DF), was developed during the 1980s in order to replace an aging stockpile of unitary chemical weapons.[1] QL is listed as a "Schedule One" chemical by the Chemical Weapons Convention.[2]


QL itself is relatively non-toxic chemical.[3] However, when reacted with sulfur, the corresponding sulphide of QL isomerizes into the highly toxic VX molecule.[1][3]


  1. 1.0 1.1 1.2 National Research Council, et al. Systems and Technologies for the Treatment of Non-stockpile Chemical Warfare Materiel, (Google Books), National Academies Press, 2002, p. 14, (ISBN 0309084520), accessed October 21, 2008.
  2. "Schedule One Chemicals", Chemical Weapons Convention, US Government website, Retrieved November 15, 2008.
  3. 3.0 3.1 Croddy, Eric and Wirtz, James J. Weapons of Mass Destruction: An Encyclopedia of Worldwide Policy, Technology, and History, (Google Books), ABC-CLIO, 2005, p. 238, (ISBN 1851094903), accessed October 21, 2008.

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