Colorless crystals, readily soluble in water.
Imidodiphosphoric Acid Tetrasodium Salt, inhibits the precipitation and dissolution of calcium phosphate in vitro. It is also a polyphosphate with imino group used as chemical fertilizers and flame proof materials.
When anhydrous disodium monoamidophosphate is heated in
vacuum to 210°C, anhydrous tetrasodium imidodiphosphate isformed
(Klement and Biberacher):
2Na2PO3NH2 = Na4P2O6(NH) + NH3
