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 40 Radioactive elements and isotopes and compounds other than those of subheading 2844.10.. Commodity Code Description 28 44 40 00 Radioactive elements and isotopes and compounds other than those of subheading 2844.10..