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 20 MANGANESE OXIDES. Commodity Code Description 28 20 10 MANGANESE DIOXIDE 28 20 90 OTHER MANGANESE OXIDES