Tri Potassium Phosphate

Potassium Phosphate is an inorganic compound used as a laxative, dietary supplement and for electrolyte-replacement purposes. Phosphate, a predominant intracellular anion, plays an important role in energy storage, osteoblastic and osteoclastic activities, regulating serum calcium concentrations and numerous cellular phosphate-transfer reactions. Potassium phosphate increases fluidity of the intestinal contents by retention of water by osmotic forces, thereby indirectly inducing intestinal smooth muscle constriction.


Molar Weight212.27 g/mol
Melting Point1,380 °C
Flash PointNon-flammable
Density2.564 g/cc
FormsLiquid, Powder (dry)

Uses and Applications

Key applications

  • Buffer agent
  • Food and Nutrition
  • Nutritional supplements
  • Water treatment
  • Dietary supplements


  • Cosmetics
  • Food
  • Water Treatment

Synonyms: Potassium phosphate, Tripotassium phosphate, Potassium phosphate tribasic, Tripotassium orthophosphate, Phosphoric acid, tripotassium salt, Potassium orthophosphate, Potassium phosphate, tribasic, Potassium phosphate, tribasic potassium phosphate

Chemical Formula: Anhydrous: K3PO4; Hydrated: K3PO4· nH2O (n = 1 or 3)

CAS Number: 7778-53-2