Section 05 Mineral products 26 Ores, slag and ash 26 20 Slag, ash and residues (other than from the manufacture of iron or steel) containing metals, arsenic or their compounds. 26 20 91 Containing antimony, beryllium, cadmium,chromium or their mixtures. Commodity Code Description 26 20 91 00 Containing antimony, beryllium, cadmium,chromium or their mixtures.