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General
- Phosphoric
acid, also known as orthophosphoric acid or phosphoric(V) acid, is
a mineral acid having the chemical formula H3PO4.
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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.
Process
- 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.
Application
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Phosphoric acid is used as a pH adjuster in cosmetics and
skin-care products.
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Phosphoric acid is used as a chemical oxidizing agent for
activated carbon production.
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Phosphoric acid is also used for High Pressure Liquid
Chromotography.
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Food-grade phosphoric acid is used to acidify foods and
beverages such as various colas.
Report
- 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.
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Determination of the viability of phosphoric acid as a
high-index fluid for immersion lithography.
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Electropolishing of Cu wafer samples were studied using a
rotating disk electrode in a variety of phosphoric
acid-based electrolytes.
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