Section 06 Products of the chemical or allied 28 Inorganic chemicals; organic or inorganic compounds of precious metals, of rare earth metals, of radioactive elements or isotopes 28 21 Iron oxides and hydroxides; earth colours containing 70 % or more by weight of combined iron evaluated as Fe2O3 Commodity Code Description 28 21 10 Iron oxides and hydroxides 28 21 20 Earth colours