u/Infrequentredditor6

Made from scratch and nearly pure, it just needs to be washed with ethanol to remove all the excess ammonium chloride before I can turn it into silver hexachloroosmate.

Fully dried and stored, probably lab grade. Only question now is... what to do with it?

Unlike the slightly soluble potassium and ammonium salts, which both require evaporation to isolate, the cesium salt is almost totally insoluble in water. It also centrifuges very easily.

The chloroosmic acid (H₂OsCl₆) was prepared by dissolving osmium dioxide in hot concentrated hydrochloric acid, and the cesium chloride was purchased from Metallium.