Dulbecco’s Phosphate-Buffered Salines (D-PBS) are isotonic buffer solutions containing potassium chloride, monobasic potassium phosphate, sodium chloride, and dibasic sodium phosphate.

A formulation with sodium pyruvate and a carbohydrate (D-glucose) is also available. All formulations are offered with and without calcium and magnesium salts, as well as with and without phenol red.