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 13 SULPHIDES OF NON-METALS; COMMERCIAL PHOSPHORUS TRISULPHIDE. 28 13 90 OTHER SULPHIDES OF NON-METALS; COMMERCIAL PHOSPHORUS TRISULPHIDE Commodity Code Description 28 13 90 00 OTHER SULPHIDES OF NON-METALS; COMMERCIAL PHOSPHORUS TRISULPHIDE