Explanatory notes
… compounds - Other : 2620.91 - - Containing antimony, beryllium, cadmium, chromium or their mixtures … Residues from the manufacture of copper sulphate. (7) Impure cobalt oxides resulting from the treatment of … with other metals. (13) Slag , a sh and residues containing antimony, beryllium, cadmium, chromium or their mixtures. …