It is used as a protective medium for welding, cutting and melting of active and rare metals and based alloys, aluminum, Al and Mg alloys, stainless chromium-nickel heat-resistant alloys and alloy steels of various grades. In addition, argon is used as a fire extinguishing substance, and in medicine – for air purification, as anesthesia, and in argon lasers. In metallurgy, argon is widely used in metal refining. In accordance with the Technical Regulation of the Customs Union 029/2012, argon is a food additive — it is used as a propellant and packaging gas.