Explanatory notes
… in Chapter 71 (i.e., silver, gold, platinum, iridium, osmium, palladium, rhodium and ruthenium), provided they are … one of their inorganic salts. Colloidal silver occurs in small grains or flakes, bluish, brownish or greenish‑grey, … same purposes as colloidal silver. Colloidal platinum is in small grey particles and has remarkable catalysing …