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 break down grease and dirt. 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 chemicals and maintain alkaline conditions during processing. Also found in some food applications as an acidity regulator and in laboratories as a primary standard for acid-base titrations.