Precious metal ores and concentrates.

2601 Iron ores and concentrates, including roasted iron pyrites.

2615 Niobium, tantalum, vanadium or zirconium ores and concentrates.

2616 Precious metal ores and concentrates.

2617 Ores and concentrates; n.e.c. in heading no. 2601, other ores and concentrates.

2620 Slag, ash and residues (other than from the manufacture of iron or steel) containing metals, arsenic or their compounds.

2621 Slag and ash n.e.c. in chapter 26; including seaweed ash (kelp) and ash and residues from the incineration of municipal waste, other slag and ash, including seaweed ash (kelp); ash and residues from the incineration of municipal waste.

2612 Uranium or thorium ores and concentrates.

2613 Molybdenum ores and concentrates.

2621 4)-O-2-O-sulfo-alpha-L-idopyranuronosyl-(1 4)-2-deoxy-2-(sulfoamino)-6-(hydrogen sul;