Sodium phosphate is a reagent with very high buffering capacity that is widely used in molecular biology, biochemistry, and chromatography. Sodium phosphate occurs in several forms: monobasic (NaH2PO4), dibasic (Na2HPO4), and tribasic (Na3PO4). Most neutral sodium phosphate buffer solutions consist of mixtures of the monobasic and dibasic forms to varying degrees, depending on the desired pH.
Sodium phosphate monobasic monohydrate is useful in conjunction with Sodium Phosphate, Dibasic in the preparation of biological buffers. Used in many applications including the purification of antibodies.
Grade: ACS Grade
Purity: 98.0% - 102.0%
Key Applications: Buffer, Laxative
Product Type: Inorganics
Biochemical Category: Salt
Melting Point: 214°C(Lit.)
Presentation: White Powder
Format: Powder
pH: 4.1 - 4.5 (5% aq soln)
pKa: (for phosphoric acid) at 25°C: pKa1 = 2.15; pKa2 = 6.82; pKa3 = 12.38
Heavy Metals: ≤0.001%
Insoluble Matter: ≤0.01%
NOTES: Chloride= ≤5 ppm; Sulfate= ≤0.003%; Calcium= ≤0.005%; Potassium= ≤0.01%; Iron= ≤0.001%
Solubility: Freely soluble in water; insoluble in ethanol.
Storage & Handling: Store at Room Temperature (15-30°C), desiccate.