High purity and specialty gases and specialty gas mixtures for commercial purposes, namely, gases for electronics and semiconductor manufacturing, gases for detection, calibration and testing; [ protective and shielding gases for use as test gases; reactive and active gases, namely, welding and cutting gases; ] gases for the treatment and machining of materials, for electronic manufacturing and process technology, namely, [ clean air, nitrogen, oxygen, carbon dioxide and carbon monoxide, ammonia as well as saturated and non-saturated hydrocarbon gases, hydrocarbon compounds, hydrogen, ] noble gases, isotope gases, nitrous oxides, [ ammonia and sulphur compounds, silanes, hydrogen compounds, ] volatile organic compounds, chlorine and fluorine gases [, nitrogen compounds, ozone, halogen, halogen compounds, boron, silicon ] and [ sulphur compounds, as well as ] mixtures of the aforesaid gases