Potassium bromide crystal optic disc is used for infrared transmission windows in gas and liquid sample cells used with infrared and FTIR spectrophotometers and for beam splitters for spectrophotometers.

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.