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 50 Hydrides, nitrides, azides, silicides and borides Commodity Code Description 28 50 00 Hydrides, nitrides, azides,silicides & borides,chem defined or not;excl.carbides
