Ammonium tetrachlorferrite, (NH₄)₂FeCl₄

Ammonium tetrachlorferrite, (NH₄)₂FeCl₄ or FeCl₂.2NH₄Cl, is readily obtained by concentrating a mixed solution of the constituent salts. It is slowly soluble in water. The solution is reduced by zinc at the boiling-point, depositing metallic iron.