Germanium dioxide, also called germanium oxide and germania, is an inorganic compound with the chemical formula GeO2.
G 1279 (OTTO) Germanium dioxide, 99.9% Cas 1310-53-8 - used as a catalyst in production of polyethylene terephthalate resin, and for production of other germanium compounds. G 1279 (OTTO) Germanium dioxide, 99.9% Cas 1310-53-8 - used as a feedstock for production of some phosphors and semiconductor materials. Germanium Dioxide, GeO2, is readily taken up by diatoms and leads to silicon being substituted by germanium in biochemical processes within the diatoms, causing a significant reduction of the diatoms' growth rate or even their complete elimination, with little effect on non-diatom algal species.