Not exactly VX, but Amiton (also known as Tetram or VG). It's about one tenth as toxic as VX, and similar in toxicity as sarin.

In 1975 the Iraqi ministry of agriculture negotiated with a U.S. company, Pfaudler, for a contract to build a pesticide production plant. The deal eventually fell through because Pfaudler did not understand why the Iraqis insisted on manufacturing Amiton instead of some safer alternative.