Used in fertilizers to provide phosphorus, an essential nutrient for plant growth. It adjusts pH in food and beverages, giving a tangy flavor, commonly found in soft drinks. Acts as a rust remover and cleaning agent for metal surfaces due to its ability to dissolve iron oxides. Employed in dentistry and orthodontics to etch tooth enamel for better adhesion of fillings and braces. Serves as a buffering agent in pharmaceuticals and in the production of detergents. Also used in semiconductor manufacturing for wafer cleaning and oxide removal.