Explanatory notes
… excluding, however, those existing in nature in the monoisotopic state; ‑ mixtures of isotopes of … the natural isotopic composition has been artificially modified. 7.‑ Heading 28.53 includes copper phosphide (phosphor copper) containing more than 15 % by weight of phosphorus. 8.‑ Chemical …Legal note
… excluding, however, those existing in nature in the monoisotopic state; ‑ mixtures of isotopes of … the natural isotopic composition has been artificially modified. 7.‑ Heading 28.53 includes copper phosphide (phosphor copper) containing more than 15 % by weight of phosphorus. 8.‑ Chemical …