Used in fertilizer production to provide phosphorus, an essential nutrient for plant growth. Commonly applied in the manufacturing of detergents and cleaning agents due to its ability to soften water and remove mineral deposits. Employed in food and beverage industry as an acidulant to add tartness, especially in colas and processed cheeses. Utilized in metal treatment processes for rust removal and surface preparation before painting or coating. Serves as a pH adjuster in pharmaceuticals and personal care products. Also used in dental and orthodontic treatments to etch tooth enamel for better adhesion of fillings or braces.