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  • Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is a mineral acid having the chemical formula H3PO4.
  • Orthophosphoric acid molecules can combine with themselves to form a variety of compounds which are also referred to as phosphoric acids, but in a more general way.
  • The term phosphoric acid can also refer to a chemical or reagent consisting of phosphoric acids, usually mostly orthophosphoric acid.
  • Pure anhydrous phosphoric acid is a white solid that melts at 42.35 C to form a colorless, viscous liquid.


  • Pure phosphoric acid is obtained by burning elemental phosphorus to produce phosphorus pentoxide and dissolving the product in dilute phosphoric acid.
  • Wet process phosphoric acid is prepared by adding sulfuric acid to calcium phosphate rock.
  • Improved Hard Process will both make low grade phosphate rock reserves commercially viable and will increase the P2O5 recovery from existing phosphate reserves.
  • Phosphoric acid reacts with halides to form the corresponding hydrogen halide gas.


  • Phosphoric acid is used as a pH adjuster in cosmetics and skin-care products.
  • Phosphoric acid is used as a chemical oxidizing agent for activated carbon production.
  • Phosphoric acid is also used for High Pressure Liquid Chromotography.
  • Food-grade phosphoric acid is used to acidify foods and beverages such as various colas.


  • The effect of phosphoric acid, which binds with magnesium and calcium in the digestive tract to form salts that are not absorbed, but, rather, it studies general phosphorus intake.
  • Determination of the viability of phosphoric acid as a high-index fluid for immersion lithography.
  • Electropolishing of Cu wafer samples were studied using a rotating disk electrode in a variety of phosphoric acid-based electrolytes.

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