Used in fertilizer production to provide phosphorus, an essential nutrient for plant growth. Also employed in food and beverage industry as an acidulant in soft drinks, particularly colas, to impart tartness and act as a preservative. In dentistry, helps in etching tooth surfaces for better bonding of fillings and sealants. Serves as a cleaning agent in industrial settings for metal surface treatment, including rust removal and phosphate coating to prevent corrosion. Used in pharmaceuticals as an excipient or buffering agent in drug formulations. Plays a role in water treatment to control scale and corrosion in pipes and boilers.