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 foods. Serves as a rust remover and metal surface treatment agent by converting 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 cleaning products for industrial and household use due to its ability to dissolve mineral deposits and scale. Used in pharmaceuticals as an excipient or active ingredient in solutions and tablets requiring controlled acidity.