Potassium calcium ferrocyanide, K₂CaFe(CN)₆

Potassium calcium ferrocyanide, K₂CaFe(CN)₆, is obtained by mixing cold concentrated solutions of potassium ferrocyanide and calcium chloride in molecular proportions. The precipitate is washed in cold water and dried in air or at 100° C.

One part of the salt dissolves in 244 parts of water at 15° to 17° C.