Section VI — Products of the chemical or allied industries
Chapter 28 — Inorganic chemicals; organic or inorganic compounds of precious metals, of rareearth metals,of radioactive elements or of isotopes
Heading 2844 — Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products.
National subdivision 2844.4 — Radioactive elements and isotopes and compounds other than those of subheading 2844.10, 2844.20 or 2844.30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues
Subheading 2844.42 — Actinium225, actinium227, californium253, curium240, curium241, curium242, curium243, curium244, einsteinium253, einsteinium254, gadolinium148, polonium208, polonium209, polonium210, radium223, uranium230 or uranium232, and their compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements or compound