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 05 Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury Commodity Code Description 28 05 11 Sodium 28 05 12 Calcium 28 05 19 Other 28 05 30 Rareearth metals, scandium and yttrium, whether or not intermixed or interalloyed 28 05 40 Mercury II INORGANIC ACIDS AND INORGANIC OXYGEN COMPOUNDS OF NONMETALS