Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 28 Inorganic chemicals; organic or inorganic compounds of precious metals , of rare 28 44 Radioactive chemical elements and radioactive isotopes (including the fissile or Commodity Code Description 28 44 10 28 44 20 28 44 30 28 44 40 28 44 41 Tritium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing tritium or its compounds. 28 44 42 Actinium-225, actinium-227, californium-253, curium-240, curium-241, curium-242, curium-243, curium-244, einsteinium-253, einsteinium-254, 28 44 43 Other radioactive elements and isotopes and compounds; other alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds 28 44 44 Radioactive residues . 28 44 50