Mono Potassium Phosphate

Potassium dihydrogen phosphate is a potassium salt in which dihydrogen phosphate(1-) is the counterion. It is a potassium salt and an inorganic phosphate. Monopotassium phosphate, MKP, (also potassium dihydrogenphosphate, KDP, or monobasic potassium phosphate), KH2PO4, is a soluble salt of potassium and the dihydrogen phosphate ion. It is a source of phosphorus and potassium as well as a buffering agent. It can be used in fertilizer mixtures to reduce escape of ammonia by keeping pH low.

Potassium dihydrogen phosphate, Potassium phosphate monobasic, Monobasic potassium phosphate, Potassium acid phosphate, Potassium dihydrogen orthophosphate, Monopotassium monophosphate, Monopotassium orthophosphate, potassium dihydrogenphosphate
Chemical Formula
CAS Number


Molar Weight
136.086 g/mol
Melting Point
253 °C
2.34 g/cc
Crystals (large), Powder (dry), White, Granular, Red-brown, Pellets

Uses and Applications

Key applications

  • Baking
  • Nutritional supplements
  • Water treatment
  • Adhesives and Sealants
  • Agricultural
  • Cosmetic products
  • Anti-ageing products


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  • Food & Nutrition