Di Potassium Phosphate

Dipotassium phosphate (K2HPO4) is a highly water-soluble salt often used as a fertilizer and food additive as a source of phosphorus and potassium as well as a buffering agent. Potassium Phosphate, Dibasic is the dipotassium form of phosphoric acid, that can be used as an electrolyte replenisher and with radio-protective activity. Upon oral administration, potassium phosphate is able to block the uptake of the radioactive isotope phosphorus P 32 (P-32).


Molar Weight174.176 g/mol
Melting Point> 465 °C decomposes
Density2.44 g/cc
FormsLiquid, Powder (dry), White

Uses and Applications

Key applications

  • Buffer agent
  • Wastewater treatment
  • Anti-freeze
  • Water treatment
  • Ceramics
  • Pulp and paper
  • Paint and Coatings


  • Agrobusiness
  • Water Treatment
  • Chemical Processing
  • Coatings & Construction
  • Pulp & Paper

Synonyms: Dipotassium hydrogen phosphate, Dipotassium hydrogenphosphate, Potassium phosphate dibasic, Potassium Hydrogen Phosphate, Dipotassium monophosphate, Potassium monohydrogen phosphate, Potassium monophosphate, Dipotassium orthophosphate

Chemical Formula: K2HPO4

CAS Number: 7758-11-4