… Isotopes other than those of heading 28.44; compounds, inorganic or organic, of such isotopes, whether …
Explanatory notes
… 28.45 ‑ Isotopes other than those of heading 28.44; compounds, inorganic or organic, of such isotopes, whether … (1) Heavy hydrogen or deuterium . This is separated from normal hydrogen in which it occurs at a level of 1 part … for slowing down the neutrons which split the uranium atoms. (3) Other compounds made with deuterium , e.g., …