Used in agriculture as a key component in the production of phosphate fertilizers to enhance plant growth and root development. Commonly employed in the food and beverage industry as an acidulant to provide tartness, especially in soft drinks and processed cheeses. Serves as a rust remover and metal cleaner in industrial settings due to its ability to convert iron oxide into a protective phosphate coating. Utilized in dentistry and orthodontics for etching tooth surfaces to improve adhesion of fillings and braces. Acts as a pH adjuster in cosmetic and personal care products to maintain stability and desired acidity. Employed in water treatment processes to control scale formation and corrosion in pipes and boilers. Used as an electrolyte in certain types of fuel cells and batteries for energy storage applications.