Explanatory notes
… replaced by metals (or by ions with analogous properties, e.g., the ammonium ion (NH 4 + )) as a result salts are … or hydroxides; these generally fall in sub‑Chapter IV (e.g., metal oxides, hydroxides and peroxides, such as acids … vanadium). In certain cases, however, they fall elsewhere, e.g., in heading 28.43 (compounds of precious metals), …