Section 06 Products of the chemical or allied industries 28 Inorganic chemicals; organic or inorganic compounds of precious metals, of rare - earth metals, of radioactive elements or isotopes 28 33 Sulphates; alums; peroxosulphates (persulphates) Commodity Code Description 28 33 11 Disodium sulphate 28 33 19 Other 28 33 21 Of magnesium 28 33 22 Of aluminium 28 33 24 Of nickel 28 33 25 Of copper 28 33 27 Of barium 28 33 29 Other 28 33 30 Alums 28 33 40 Peroxosulphates (persulphates)
