Phosphoric Acid is a colourless, odourless phosphorus-containing inorganic acid. Phosphoric acid is a sequestering agent which binds many divalent cations, including Fe++, Cu++, Ca++, and Mg++. 

• Phosphoric acid in foods is an additive used to enhance flavoring of different products, improve texture, and also it acts as a preservative. It is used in almost all carbonated beverages and dairy products. It keeps the processed food fresh and stable.
•  Phosphoric acid is used in dentistry and orthodontics as an etching solution, to clean and roughen the surfaces of teeth where dental appliances or fillings will be placed. In addition, phosphoric acid is a constituent in bone and teeth, and plays a role in many metabolic processes.