Potassium dihydrogen phosphate, anhydrous ≥99%, white crystalline powder ACS

Supplier: MP Biomedicals

Synonyms: Monopotassiumphosphate, prim.-Potassium phosphate, Monopotassium phosphate, Potassium phosphate monobasic, Monobasic Potassium Phosphate, Potassium dihydrogen orthophosphate

02191430.1 02191430.5 0219143001 0219143005
ICNA02191430.1EA 105 SGD
ICNA02191430.1 ICNA02191430.5 ICNA0219143001 ICNA0219143005
Potassium dihydrogen phosphate, anhydrous ≥99%, white crystalline powder ACS
Potassium dihydrogen phosphate

Potassium phosphate is a reagent with high buffering capacity. It occurs in several forms: monobasic, dibasic, and tribasic (K3PO4). Most pH neutral potassium phosphate buffer solutions consist of mixtures of the monobasic and dibasic forms to varying degrees, depending on the desired pH.


Potassium Phosphate Monobasic is used as a component for a wide variety of media used in the culture of microorganisms, as a component in phosphate buffered saline (PBS). In addition to helping maintain pH, it supplies essential phosphate.


Soluble in water (0,5 g in 10 ml water), insoluble to slightly soluble in ethanol; insoluble in alcohol.


Caution: Research Use Only (RUO).

Formula: KH₂PO₄
MW: 136,09 g/mol
Storage Temperature: Ambient
MDL Number: MFCD00011401
CAS Number: 7778-77-0

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Specification Test Results

Identity Test Passes
Assay ≥99%
pH (5% aq soln, 25 °C ) 4,1 - 4,5
Insoluble Matter ≤0,01%
Loss on Drying (105 °C) ≤0,2%
Chloride (Cl) ≤0,001%
Sulphate (SO₄) ≤0,003%
Heavy Metals (as Pb) <0,001%
Iron (Fe) ≤0,002%
Sodium (Na) ≤0,005%

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