Manufacture of other inorganic basic chemicals

This class includes the manufacture of chemicals using basic processes. The output of these processes are usually separate chemical elements or separate chemically defined compounds. This class includes: - manufacture of chemical elements (except industrial gases and basic metals) - manufacture of inorganic acids except nitric acid - manufacture of alkalis, lyes and other inorganic bases except ammonia - manufacture of other inorganic compounds - roasting of iron pyrites - manufacture of distilled water This class also includes: - enrichment of uranium and thorium ores

This class excludes: - manufacture of industrial gases, see 20.11 - manufacture of nitrogenous fertilisers and nitrogen compounds, see 20.15 - manufacture of ammonia, see 20.15 - manufacture of ammonium chloride, see 20.15 - manufacture of nitrites and nitrates of potassium, see 20.15 - manufacture of ammonium carbonates, see 20.15 - manufacture of aromatic distilled water, see 20.53 - manufacture of basic metals, see division 24