Phosphate-buffered saline is used in biological research. PBS buffer is ideal for maintaining a constant pH, and since it is isotonic to cells. PBS is frequently used as a wash and dilution buffer, and is also used to take a reference spectrum when measuring protein adsorption. And also used in immunoassay procedures.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.