Used in the laboratory for the titration of weak acids, especially organic acids, due to its strong basicity and clear aqueous solution. Commonly employed in the synthesis of barium-containing compounds and in the production of catalysts. Also utilized in the sugar industry for the refining of beet sugar, where it helps in the precipitation of impurities. Plays a role in the preparation of certain lubricating greases and in the removal of sulfate ions from solutions by precipitation as barium sulfate.

Additionally, it is used for the absorption and determination of carbon dioxide in analytical procedures, forming barium carbonate precipitate.