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 40 Nickel oxides and hydroxides 28 25 40 00 Nickel oxides and hydroxides Commodity Code Description 28 25 40 00 000 Nickel oxides and hydroxides