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) 28 33 25 Of copper 28 33 25 00 Of copper Commodity Code Description 28 33 25 00 000 Of copper
