Mono Ammonium Phosphate

Ammonium dihydrogen phosphate is the ammonium salt of phosphoric acid (molar ratio 1:1). It contains a dihydrogenphosphate. ADP is a major ingredient of agricultural fertilizers and some fire extinguishers. It also has significant uses in optics and electronics.


Molar Weight115.03 g/mol
Melting Point190 °C
FormsPowder (dry), White, Granular, Pellets

Uses and Applications

Key applications

  • Baking
  • Ceramics
  • Pulp and paper
  • Wine production
  • Fertiliser
  • Textile handling
  • Acidifying agent


  • Pulp & Paper
  • Food
  • Agrobusiness

Synonyms: Ammonium dihydrogen phosphate, Ammonium biphosphate, MONOAMMONIUM PHOSPHATE, Ammonium acid phosphate, Ammonium dihydrogen orthophosphate, Phosphoric acid, monoammonium salt, ADP

Chemical Formula: NH4H2PO4

CAS Number: 7722-76-1