Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 28 Inorganic chemicals; organic or inorganic compounds of precious metals , of rare 28 45 Isotopes other than those of heading 28.44; compounds, inorganic or organic, of 28 45 10 28 45 10 00 Commodity Code Description 28 45 10 00 00 - Heavy water (deuterium oxide) 28 45 20 00 00 Boron enriched in boron-10 and its compounds 28 45 30 00 00 Lithium enriched in lithium-6 and its compounds 28 45 40 00 00 Helium-3 28 45 90 00 00 - Other