0.01 M Phosphate Buffered Saline pH 7.4 is a common buffer extensively used in molecular biology and biochemistry as it can maintain pH and osmolarity. 0.01 M Phosphate Buffered Saline pH 7.4 Solution is supplied as a ready to use form for convenience. 0.01 M Phosphate Buffered Saline pH 7.4 is a water‐based salt solution containing Sodium chloride, Potassium chloride, Disodium hydrogen phosphate and Potassium dihydrogen phosphate. This solution is extensively used for dilution and washing during various biological applications as it maintains the physiological pH and osmolarity. The phosphate groups of this buffer help to maintain a constant pH.