… carbon; activated natural mineral products; animal black, including spent animal black. …
Explanatory notes
… heat treatment of certain vegetable or mineral substances (clay, bauxite, etc.) in the presence of natural impurities … (for example, in recovering volatile solvents during dry‑cleaning processes, removing benzene from coal gas), for … beverages, for filtering water, etc. (3) Activated clays and activated earths . These consist of selected …