High purity gases, namely, atmospheric gases, oxygen, nitrogen, argon, carbon monoxide, carbon dioxide, methane, ethane, ammonia, hydrogen chloride, hydrogen sulfide, sulfur dioxide, hydrogen, pentane, hexane, propane, propylene, butane, isobutene, butylene, butadiene, acetylene, benzene, alkyl benzenes, methyl mercaptan, ethyl mercaptan, carbonyl sulfide, carbonyl disulfide, nitric oxide, chlorine, thiophene; special purpose gases and special gas mixtures for industrial purposes, technical p...