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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 1741 (OTTO) Aluminium oxide, 99.99% Cas 1344-28-1 - used for the C single crystal detectors. It plays an important role for the hydrogenation of aromatic hydrocarbons.