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 44 Radioactive elements and isotopes and compounds other than those of Subheading 2844.. 28 44 20 Uranium enriched in U 235 and its compounds; plutonium and its compounds alloys ........ Commodity Code Description 28 44 20 00 Uranium enriched in U 235 and its compounds; plutonium and its compounds alloys ........