Used in fertilizer production to provide phosphorus essential for plant growth. Commonly employed in food and beverage industry as an acidulant in soft drinks to impart tartness and act as a preservative. Utilized in dentistry and orthodontics to etch tooth surfaces for better adhesion of fillings and braces. Serves in metal treatment processes for rust removal and conversion coating to improve paint adhesion. Also found in cleaning products for its ability to dissolve mineral deposits and scale. Used in pharmaceuticals as an acidifier and in buffer solutions to maintain pH stability.