Used in fertilizer production to provide phosphorus essential for plant growth. Commonly employed in food and beverage industry as an acidulant in soft drinks to impart tartness and act as a preservative. Utilized in dentistry and orthodontics for etching teeth to improve adhesion of fillings and braces. Applied in metal surface treatment to remove rust and prepare surfaces for painting or coating. Serves as a pH adjuster in cosmetics, cleaning agents, and pharmaceuticals. Also used in laboratory settings as a buffer component and reagent.