The U.S. Army stored approximately twelve percent of its original chemical weapons at the Pine Bluff Arsenal since 1942.
Construction of the diphenylcyanoarsine (DC) facility began in the mid-1980s and a classified number of canisters were produced.
A facility was planned to produce QL (diisopropyl aminoethylmethyl phosphonite), a precursor to the nerve agent VX.
Construction began in the late 1980s, but it was mothballed prior to completion in the early 1990s as part of the chemical weapons treaties.
The facility reached 100% destruction of its total chemical stockpile of 3,850 metric tons on November 12, 2010.