Germanium dioxide is used in algaculture.A mixture is used as an optical material for optical fibers and optical waveguides It is also used as a catalyst in production of polyethylene terephthalate resin and for production of other germanium compounds. It is used as a feedstock for production of some phosphors and semiconductor materials.

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.