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 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.
Grade: Anhydrous
Assay: ≥99.0%
Key Applications: Component for a wide variety of media
Application Areas: Component for a wide variety of media used in the culture of microorganisms and phosphate buffered saline (PBS)
Product Type: Inorganics
Chemical Class: Salts
Density: 2.338 g/mL at 25°C(Lit.)
Melting Point: 252.6°C(Lit.)
Presentation: White Crystalline Powder
Format: Crystalline Powder
pH: 4.1 - 4.5 (5% aq soln)
pKa: (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) at 25°C (Lit.)
Solubility: Soluble in water; Insoluble to slightly soluble in ethanol; insoluble in alcohol.
Storage & Handling: Store at Room Temperature (15-30°C). Store Desiccated.