Section 06 Products of the chemical or allied industries 28 Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or isotopes 28 44 Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products. Commodity Code Description 28 44 10 Natural uranium and its compounds; alloys dispersions (including cermets) ceramic...; 28 44 20 Uranium enriched in U235 and its compounds alloys, dispersions (including cermets)...; 28 44 30 Uranium depleted in U235 and its compounds; thorium and its compounds; alloys...; 28 44 40 Radioactive elements/isotopes and their compounds...; 28 44 41 Tritium and its compounds; alloys, dispersions (including cermets), ceramic products 28 44 42 Actinium-225, actinium-227, californium-253, curium-240, curium-241, curium-242, curi 28 44 43 Other radioactive elements and isotopes and compounds; other alloys, dispersions (inc 28 44 44 Radioactive residues 28 44 50 Spent (irradiated) fuel elements (cartridges) of nuclear reactors