Used in fertilizer production to provide phosphorus essential for plant growth. Commonly employed in food and beverage industry as an acidulant to add tartness, especially in colas and processed cheeses. Serves as a rust remover and metal surface treatment agent by converting iron oxide into stable iron phosphate. Utilized in dentistry and orthodontics for etching tooth surfaces to improve adhesion of fillings and braces. Acts as a pH adjuster in cosmetics, cleaning agents, and pharmaceuticals. Also functions as a dispersing agent in detergents and industrial water treatment systems.