Noun
One of a complex series of double cyanides of ferric iron and some other base.
Source: Webster's dictionaryHistory of discovery The red colored ferricyanide ion, one component of Prussian blue Hydrogen cyanide was first isolated from a blue pigment ( Prussian blue ) which had been known since 1704 but whose structure was unknown. Source: Internet
Its formation can be used as a simple wet chemistry test to distinguish between aqueous solutions of Fe 2+ and Fe 3+ as they react (respectively) with potassium ferricyanide and potassium ferrocyanide to form Prussian blue. Source: Internet
It is possible to reduce ferricyanide ions to ferrocyanide ions at the cathode: :Fe(CN)main + e − → Fe(CN)main Neutral molecules can also react at either of the electrodes. Source: Internet