Potassium ferrocyanide in the context of "Ferrocyanide"

Ferrocyanide is the anion [Fe(CN)₆]. Salts of this coordination complex give yellow solutions. It is usually available as the salt potassium ferrocyanide, which has the formula K₄Fe(CN)₆. [Fe(CN)₆] is a diamagnetic species, featuring low-spin iron(II) center in an octahedral ligand environment. Although many salts of cyanide are highly toxic, ferro- and ferricyanides are less toxic because they tend not to release free cyanide. It is of commercial interest as a precursor to the pigment Prussian blue and, as its potassium salt, an anticaking agent.