[chemical] 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. It, along with Methylphosphonyl difluoride (DF), was d... Found on http://en.wikipedia.org/wiki/QL_(chemical)