… Isotopes other than those of heading 28.44; compounds, inorganic or organic, of such isotopes, whether or not chemically defined. …
Explanatory notes
… inorganic or organic, of such isotopes, whether or not chemically defined. 2845.10 ‑ Heavy water (deuterium … of the term “isotopes”, see Part (I) of Explanatory Note to heading 28.44. This heading covers stable isotopes, that is, non‑radioactive isotopes and their inorganic or organic …