Di Ammonium Phosphate

Diammonium phosphate is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid. DAP is used as a fertilizer. When applied as plant food, it temporarily increases the soil pH, but over a long term the treated ground becomes more acidic than before upon nitrification of the ammonium. DAP can be used as a fire retardant. It lowers the combustion temperature of the material, decreases maximum weight loss rates, and causes an increase in the production of residue or char.

Ammonium di(lauryl) phosphate, ammonium didodecyl phosphate, SCHEMBL1204896, Ammonium Phosphate Dibasic, DAP, Diammonium Hydrogen Phosphate, Diammonium Phosphate, E 342, Phosphoric Acid, Diammonium Salt
Chemical Formula
CAS Number


Molar Weight
132.06 g/mol
Melting Point
155 °C
1.619 g/cc
Crystals, White

Uses and Applications

Key applications

  • Flame retardant
  • Wine production
  • Fertiliser
  • Animal feed


  • Food & Nutrition
  • Agriculture