Tetra Potassium Pyrophosphate

Potassium tetrapyrophosphate is a whitish-colored powdered solid. It is toxic by ingestion, and/or inhalation. Contact with the substance should be avoided.


Molar Weight330.34 g/mol
Melting Point-50.0°C
Boiling Point230.0°C
Density1.74 g/cc
FormsLiquid, Viscous, Liquid (clear), Colourless

Uses and Applications

Key applications

  • Buffer agent
  • Food and Nutrition
  • Water treatment
  • Emulsifying agent


  • Water Treatment
  • Cosmetics
  • Food

Synonyms: Diphosphoric Acid Tetrapotassium Salt, E 450, Tetrapotassium Pyrophosphate, Tetrapotassium Pyrophosphate Food Grade, TKPP

Chemical Formula: K4P2O7

CAS Number: 7320-34-5