Barium Hydroxide Monohydrate Cas No: 22326-55-2 are chemical compounds with the chemical formula Ba(OH)2(H2O)x. The monohydrate (x =1) is known as baryta, or baryta-water. Industrially, barium hydroxide is used as the precursor to other barium compounds. The monohydrate is used to dehydrate and remove sulfate from various products. It is also used extensively as a stabilizer in the production of resins. ZXCHEM GROUP