C 4776 (OTTO) Ceric oxide, 99.999% Cas 1306-38-3 - used as a high-temperature hydrocarbon oxidation catalyst in self-cleaning ovens. C 4776 (OTTO) Ceric oxide, 99.999% Cas 1306-38-3 - used in infrared filters, incandescent mantles, and sunscreens in combination with other materials. It finds use as a catalyst support, and to sensitize photosensitive glass.