Aluminium oxide is an amphoteric substance, meaning it can react with both acids and bases, such as hydrofluoric acid and sodium hydroxide, acting as an acid with a base and a base with an acid, neutralising the other and producing a salt.
A 5093 (OTTO) Aluminium oxide, gamma-phase, 99.997% - used for the C single crystal detectors. It plays an important role for the hydrogenation of aromatic hydrocarbons.