Cupric sulphate, pentahydrate, 98% Cas 7758-99-8 - used to grow crystals in schools and in copper plating experiments, despite its toxicity.  Cupric sulphate, pentahydrate, 98% Cas 7758-99-8 - used to demonstrate an exothermic reaction, in which steel wool or magnesium ribbon is placed in an aqueous solution of CuSO4. Cupric sulphate, pentahydrate, 98% Cas 7758-99-8 - used to demonstrate the principle of mineral hydration.

Cupric sulphate, pentahydrate, GR 99%+ Cas 7758-99-8 - used to test blood for anemia. The blood is tested by dropping it into a solution of copper sulfate of known specific gravity – blood which contains sufficient hemoglobin sinks rapidly due to its density, whereas blood which does not sink or sinks slowly has insufficient amount of hemoglobin.