Reephos Ferric Phosphates includes Ferric pyrophosphate, Ferric Orthophosphate.
Ferric Pyrophosphate occurs as a tan or yellow-white powder. It is insoluble in water, but is soluble in mineral acids.
Ferric Orthophosphate occurs as a yellow-white to buff colored powder. It contains from one to four molecules of water of hydration. It is insoluble in water and in glacial acetic acid, but is soluble in mineral acids.