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 33 SULPHATES; ALUMS; PEROXOSULPHATES (PERSULPHATES). Commodity Code Description 28 33 11 DISODIUM SULPHATE 28 33 19 OTHER SODIUM SULPHATES 28 33 21 OTHER SULPHATES OF MAGNESIUM 28 33 22 OTHER SULPHATES OF ALUMINIUM 28 33 24 OTHER SULPHATES OF NICKEL 28 33 25 OTHER SULPHATES OF COPPER 28 33 27 OTHER SULPHATES OF BARIUM 28 33 29 OTHER SULPHATES 28 33 30 ALUMS 28 33 40 PEROXOSULPHATES (PERSULPHATES)