Used in fertilizer production to provide phosphorus, an essential nutrient for plant growth. Commonly applied in the manufacturing of diammonium phosphate (DAP) and other phosphate-based fertilizers. Widely used in the food and beverage industry as an acidulant to add tartness, especially in colas and processed cheeses. Helps control pH and acts as a preservative. Employed in metal surface treatment for rust removal and as a component in phosphating processes to prepare metal surfaces for painting. Used in dentistry and orthodontics to etch tooth surfaces, improving adhesion of fillings and braces. Serves as a buffering agent in laboratory applications and in some pharmaceutical formulations to maintain stable pH levels.