Component Of Chemical Weapons Destroyed The Associated Press In accordance with an international treaty, the Army has completed the destruction of 254,000 pounds of a chemical ingredient used in the making of nerve agent. The last of the military's supply of the chemical D-F, which had been stored only at the Pine Bluff Arsenal, was neutralized with water on Thursday. The chemical was kept for combination in rockets with another non-lethal component to form the nerve agent sarin. A 1989 agreement with the former Soviet Union ended that weapons program in 1991, leaving D-F in storage until destruction. The United States also agreed to the Chemical Weapons Convention that required the destruction of all chemical warfare materiel and production capacity by April 2007. In accordance with that treaty, the arsenal began incinerating chemical weapons such as land mines and rockets in March 2005.