Calcium ammonium ferrocyanide, (NH4)2CaFe(CN)6, results on mixing cold concentrated solutions of calcium chloride and ammonium ferrocyanide, in equimolecular proportions, washing the precipitate and drying in air or at 100° C. It also results on boiling potassium calcium ferrocyanide with water containing a large excess of ammonium chloride.
One part of the salt dissolves in 388 parts of water at 15° to 17° C. |