Barium oxide is a compound consisting of barium and oxygen. It is also known as baryta, barium monoxide, and barium protoxide. Baryta is commonly used in the manufacturing of glass, ceramics, and molecular sieve. As a reagent, it is used in various chemical reactions. Barium monoxide is also used in the welding industry, as a drying agent, and as a catalyst in organic reactions. It has a high melting point and is considered a strong base. Barium protoxide is also used in the production of ferrite magnets, purification of crude oil, and in the production of other barium compounds. The various synonyms for barium oxide indicate its versatility and importance in various industrial applications.