"I asked for proof that the USA sold and provided Saddam Hussein with chemical weapons "
Evasive semantics - the West provided the wherewithal for Hussein to manufacture chemical weapons - nothing else is relevant
Jim Carroll

Project 922 was the codename for Iraq's third and most successful attempt to produce chemical and biological weapons. Within three years (1978–1981), Project 922 had gone from concept to production for first generation Iraqi chemical weapons (mustard agent). By 1984 Iraq started producing its first nerve agents, Tabun and Sarin. In 1986, a five-year plan was drawn up that ultimately led to biological weapons production. By 1988 Iraq had produced VX. The program reached its zenith in the late 1980s during the Iran-Iraq war. From August 1983 to July 1988 Iran was subjected to extensive Iraqi chemical attacks. Between 1981 and 1991, Iraq produced over 3,857 tons of CW agents.[citation needed]
As part of Project 922, German firms such as Karl Kolb helped build Iraqi chemical weapons facilities such as laboratories, bunkers, an administrative building, and first production buildings in the early 1980s under the cover of a pesticide plant. Other German firms sent 1,027 tons of precursors of mustard gas, sarin, tabun, and tear gasses in all. This work allowed Iraq to produce 150 tons of mustard agent and 60 tons of Tabun in 1983 and 1984 respectively, continuing throughout the decade. All told, 52% of Iraq's international chemical weapon equipment was of German origin. France also provided glass-lined reactors, tanks, vessels, and columns used for the production of chemical weapons. Around 21% of Iraq's international chemical weapon equipment was French. 75,000 shells and rockets designed for chemical weapon use also came from Italy. About 100 tons of mustard gas also came from Brazil. The United States exported $500 million of dual use exports to Iraq that were approved by the Commerce Department. Among them were advanced computers, some of which were used in Iraq's nuclear program. The United Kingdom paid for a chlorine factory that was intended to be used for manufacturing mustard gas.[3] Austria also provided heat exchangers, tanks, condensers, and columns for the Iraqi chemical weapons infrastructure, 16% of the international sales. Singapore gave 4,515 tons of precursors for VX, sarin, tabun, and mustard gasses to Iraq.
The Dutch gave 4,261 tons of precursors for sarin, tabun, mustard, and tear gasses to Iraq. Egypt gave 2,400 tons of tabun and sarin precursors to Iraq and 28,500 tons of weapons designed for carrying chemical munitions. India gave 2,343 tons of precursors to VX, tabun, Sarin, and mustard gasses. Luxembourg gave Iraq 650 tons of mustard gas precursors. Spain gave Iraq 57,500 munitions designed for carrying chemical weapons. In addition, they provided reactors, condensers, columns and tanks for Iraq's chemical warfare program, 4.4% of the international sales. China provided 45,000 munitions designed for chemical warfare

http://en.wikipedia.org/wiki/Iraqi_chemical_weapons_program