Barium hydroxide, Ba(OH)2, is also known as baryta. Barium hydroxide crystallizes as the octahydrate, which can be converted to the monohydrate by heating in air. The anhydrous hydroxide has only a secondary industrial importance; the monohydrate and octahydrate are used in industry on a far larger scale. Barium hydroxide, especially the monohydrate, is used to produce organic barium compounds such as additives for oil and stabilizers for plastics. In addition, barium hydroxide is used for dehydration and deacidification, especially for removing sulfuric acid from fats, oils, waxes, and glycerol.