Used in fertilizer production to provide phosphorus, an essential nutrient for plant growth. Commonly applied in the manufacturing of phosphate-based detergents and cleaning agents due to its ability to soften water and remove mineral deposits. Serves as an acidulant in food and beverages, particularly in colas, to provide tartness and act as a preservative. Employed in metal surface treatment processes, such as phosphating, to improve corrosion resistance and paint adhesion. Utilized in dentistry and orthodontics to etch tooth surfaces for better bonding of fillings or braces. Also functions as a pH adjuster in various industrial and agricultural formulations.