Used in fertilizer production to provide phosphorus, an essential nutrient for plant growth. Commonly applied in agriculture to enhance crop yield and soil fertility. Acts as an acidulant in food and beverages, particularly in soft drinks, to provide tartness and act as a preservative. Employed in rust removal and metal surface treatment, where it converts iron oxide into a protective phosphate coating that prevents further corrosion. Used in dentistry and orthodontics to etch tooth surfaces, improving adhesion of fillings and sealants. Serves as a cleaning agent in industrial settings for removing scale and deposits from equipment and boilers. Utilized in pharmaceuticals as an excipient or active ingredient in dental cements and solutions for calcium regulation.