… Colloidal precious metals; inorganic or organic compounds of …
Explanatory notes
… Sub-Chapter VI MISCELLANEOUS 28.43 ‑ Colloidal precious metals; inorganic or organic compounds of … as listed in Chapter 71 (i.e., silver, gold, platinum, iridium, osmium, palladium, rhodium and ruthenium), provided they are in colloidal suspension. These precious …