Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 28 INORGANIC CHEMICALS; ORGANIC OR INORGANIC COMPOUNDS OF PRECIOUS METAL, OFRARE-EARTH METALS, OF RADIOACTIVE ELEMENTS OR OF ISOTOPES 28 44 MIXTURES AND RESIDUES CONTAINING THESE PRODUCTS. 28 44 40 RADIOACTIVE ELEMENTS & ISOTOPES & COMPOUNDS Commodity Code Description 28 44 40 00 RADIOACTIVE ELEMENTS & ISOTOPES & COMPOUNDS