Used in fertilizer production to provide phosphorus, an essential nutrient for plant growth. Acts as an acidulant in food and beverages, particularly in soft drinks, to add tartness and control pH. Employed in rust removal and metal surface treatment by converting iron oxide into a protective phosphate coating. Serves as a cleaning agent in industrial and household products due to its ability to dissolve mineral deposits. Utilized in dentistry and orthodontics to etch tooth surfaces for better adhesion of fillings and braces. Also functions as a pH adjuster in cosmetics, pharmaceuticals, and water treatment processes.