Manufacture of basic chemicals

This class includes: - manufacture of liquefied or compressed inorganic industrial or medical gases: • elemental gases • liquid or compressed air • refrigerant gases • mixed industrial gases • inert gases such as carbon dioxide • isolating gases

This class excludes: - extraction of methane, ethane, butane or propane, see 06.20 - manufacture of fuel gases such as ethane, butane or propane in a petroleum refinery, see 19.20 - manufacture of gaseous fuels from coal, waste etc., see 35.21