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 bonding of fillings and braces. Serves in metal surface treatment for rust removal and conversion coating to improve paint adhesion. Applied in cleaning products for industrial equipment due to its ability to dissolve mineral deposits and scale. Also used in pharmaceuticals as an acidifier in some medications.