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 04 Hydrogen, rare gases and other non-metals 28 04 50 Boron; tellurium 28 04 50 00 Boron; tellurium Commodity Code Description 28 04 50 00 000 Boron; tellurium
