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 25 Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides. 28 25 50 Copper oxides and hydroxides 28 25 50 00 Copper oxides and hydroxides Commodity Code Description 28 25 50 00 000 Copper oxides and hydroxides
