Dipotassium hydrogen orthophosphate trihydrate, white crystalline powder, Reagent Grade

Supplier: MP Biomedicals

Synonyms: Dipotassium hydrogen phosphate trihydrate, Potassium hydrogen phosphate trihydrate, di-Potassium hydrogen phosphate trihydrate, Potassium phosphate dibasic trihydrate, di-Potassium hydrogen orthophosphate trihydrate

02191432.1 02191432.5 0219143201 0219143205
ICNA02191432.1EA 39.7 GBP
ICNA02191432.1 ICNA02191432.5 ICNA0219143201 ICNA0219143205
Dipotassium hydrogen orthophosphate trihydrate, white crystalline powder, Reagent Grade
di-Potassium hydrogen orthophosphate trihydrate

Potassium phosphate is a reagent with high buffering capacity. It occurs in several forms: monobasic, dibasic and tribasic. Most pH neutral potassium phosphate buffer solutions consist of mixtures of the monobasic and dibasic forms to varying degrees, depending on the desired pH.


  • Component of Culture media
  • Component in phosphate buffered saline


Potassium phosphate dibasic is widely used in molecular biology, biochemistry, and chromatography. It is typically used as a component for a wide variety of media used in the culture of microorganisms, also as a component in phosphate buffered saline (PBS). In addition to helping maintain pH, it supplies essential phosphate.


Soluble in water(100 mg/ml); Insoluble to slightly soluble in ethanol; insoluble in alcohol.


Caution: Research Use Only (RUO).

Formula: K₂HPO₄·3H₂O
MW: 228,22 g/mol
Storage Temperature: Ambient
MDL Number: MFCD00149926
CAS Number: 16788-57-1

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Specification Test Results

Identity Test Passes
FTIR Conforms to Reference
pH (5% aq soln) 8,5 - 9,6
Solubility (0,2 g/ml in water) Clear, colorless

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