Profile: Air Liquide S.A. provides industrial & medical gases and related services. We supply oxygen, nitrogen & hydrogen gases and services to chemicals, glass metallurgy, paper & aerospace industrial needs. We produce monomers, synthesis intermediates, polymers and fine chemistry products. Our helium is an extremely light gas, which is used in leak detection, helium neon lasers and for cooling of superconducting magnets. Our carbon dioxide gas is used in synthesis chemistry and for controlling reactor temperatures to neutralize alkaline effluents.