Used in water treatment to adjust pH and soften water by removing calcium and magnesium ions. Commonly employed in the production of detergents and cleaning agents due to its ability to neutralize acids and enhance cleaning efficiency. Plays a key role in the manufacturing of glass, especially container and flat glass, by lowering the melting point of silica. Utilized in the pulp and paper industry to regenerate cooking chemicals in the kraft process and maintain alkaline conditions. Also found in some food applications as a processing aid, such as in the preparation of certain noodles or pretzels, where it contributes to texture and browning.