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