Ammonium phosphate is an unstable compound made of ammonium and phosphate salt with the chemical formula (NH₄)₃PO₄.

Ammonium phosphate is manufactured by mixing together ammonium phosphate and urea in a molten condition. Considerable heat is generated which transform the ammonium phosphate to the molten state. It includes a group of nitrogen phosphorus materials: mono ammonium phosphates and diammonium phosphates, mixtures of the two or combinations with ammonium nitrate or ammonium sulfate.

Properties of Ammonium phosphate

Chemical Formula : (NH₄)₃PO₄

Appearance : White, tetrahedral crystals

Odour : Ammonia odour

Density : 1.619 g/cubic cm

Molecular Weight/ Molar Mass : 149.09 g/mol

Boiling Point : 130°C

Melting Point : 155 °C (311 °F; 428 K) decomposes

Solubility : Readily soluble in water

Uses of Ammonium phosphate

Ammonium phosphate is a broad generic name for a variety of fertilizer materials containing both nitrogen and phosphate.

Ammonium phosphates are becoming increasingly important as a source of available P2O5. P2O5 is somewhat higher in ammonium phosphates than in triple superphosphate.

Mainly used as a solid fertilizer but can also be utilized in solution.

Used as components of intumescent paints and mastics where they function as an acid catalyst.

Used in paints in which pentaerythritol is the carbonific component and melamine is the specific compound.