Used in agriculture as a key component in the production of phosphate fertilizers to enhance plant growth and root development. Employed in the food and beverage industry as an acidulant to provide tartness, especially in colas and other soft drinks. Serves as a rust remover and metal surface treatment agent by converting iron oxide into stable iron phosphate. Utilized in dentistry and orthodontics for etching tooth enamel to improve adhesion of fillings and brackets. Acts as a pH adjuster in cosmetic and personal care products to maintain stability and desired acidity. Used in cleaning products for industrial and household applications due to its ability to dissolve mineral deposits and scale. Functions as an electrolyte in certain types of fuel cells and electrochemical devices.