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 in metal surface treatment for cleaning, etching, and rust removal from steel and iron surfaces. Utilized in dentistry and orthodontics for etching tooth enamel to improve adhesion of fillings and braces. Acts as a pH adjuster in cosmetics, cleaning agents, and personal care products. Used in pharmaceuticals as an excipient or active ingredient in dental cements and medications for calcium regulation. Functions as an electrolyte in certain types of fuel cells and electrochemical devices.