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Scandium hydroxide is an inorganic compound with the chemical formula Sc3, the trivalent hydroxide of scandium. It is an amphoteric compound. It is slightly soluble in water, and its saturated solution contains Sc3 and a small amount of Sc2. The solubility of scandium hydroxide in water is 0.0279 mol/L. It will convert to ScO after aging, greatly reducing the solubility. Scandium hydroxide can be produced by reacting scandium salts and alkali hydroxides. In the reaction, different starting ingredients can generate different intermediates such as Sc1.75Cl1.25, Sc2NO3 and Sc2.320.34.
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