Used as a strong alkaline cleaning agent in industrial and commercial settings, especially for removing fats, oils, and proteins from surfaces. Commonly applied in the production of soaps and detergents through saponification of fats. Employed in pH control for water treatment and chemical manufacturing processes. Utilized in the food industry for washing or peeling fruits and vegetables, and in the preparation of certain foods like cocoa and chocolate. Plays a role in the manufacture of batteries, especially alkaline batteries, due to its ionic conductivity. Also used in laboratories for titrations and as a reagent in various chemical reactions.