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, particularly in soft drinks and processed foods. Serves in metal surface treatment for rust removal and as a pre-treatment before painting or coating to improve adhesion. Utilized in dentistry and orthodontics for etching tooth enamel to improve bonding of fillings and braces. 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 grease. Functions as an electrolyte in certain types of fuel cells and electrochemical devices.