Sapphire is used as an insulating substrate upon which to deposit silicon to make the integrated circuits, high-power radio-frequency (RF) applications such as those found in cellular telephones, public-safety band radios, and satellite communication systems, used in the semiconductor industry, blue light-emitting diodes.

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.