… of an anhydride from which the manganites of heading 28.41 are derived. This heading does not include … This anhydride gives the permanganates of heading 28.41. Permanganic acid is excluded ( heading 28.25 ). …
… : (a) Radioactive iron powders (isotopes) ( heading 28.44 ). (b) Iron powders put up as medicaments in the … in heading 73.26 in accordance with Note 7 to Chapter 84. Such bearing balls differ from shot because they have a …
… oxide; thus a natural ferrous earth colour containing 84 % of ferric oxide (representing 58.8 % of pure iron) … which, after oxygenation, gives the ferrates of heading 28.41. This heading excludes : (a) Ferrous earth colours …
