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 49 CARBIDES, WHETHER OR NOT CHEMICALLY DEFINED. 28 49 90 OTHER CARBIDES Commodity Code Description 28 49 90 00 OTHER CARBIDES