BaOH

Barium hydroxide, with the chemical formula Ba(OH)2, is an inorganic compound. It exists in anhydrous form and as a hydrate, most commonly as the octahydrate, Ba(OH)2·8H2O. The anhydrous form is a white powder, while the octahydrate appears as white crystals. Barium hydroxide is a strong base, meaning it readily dissociates in water to produce hydroxide ions. It is soluble in water, and its solutions are alkaline.

Barium hydroxide is typically produced by reacting barium oxide or barium carbonate with water. It has several industrial applications. It is used in the purification of sugar, where it precipitates impurities such as sulfates and carbonates. It also finds use as a lubricant additive, in the production of other barium compounds, and in some analytical chemistry procedures. In laboratories, it can be used as a source of hydroxide ions for various reactions. It is important to handle barium hydroxide with care, as it is corrosive and can cause irritation or burns upon contact with skin and eyes. Ingestion can be toxic due to the presence of the barium ion.