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Orthophosphoric acid

Orthophosphoric acid is inorganic acid of average force.Химическая формула ортофосфорной кислоты

Its chemical formula – H3PO4, designation as nutritional supplement – E338.

Orthophosphoric acid represents colourless hydroscopic crystals, well soluble in water (as a rule, orthophosphoric acid call its 85% solution).

Receiving orthophosphoric acid

Receiving orthophosphoric acid happens:

  • Phosphorus pentachloride hydrolysis;
  • From phosphate;
  • Interaction of oxide of phosphorus (V) with water.

Properties of orthophosphoric acid

The main property of orthophosphoric acid is its impact on acid-base balance of an organism that leads to increase in acidity.

The hyperoxemia increases risk of development of many diseases, including caries and early osteoporosis.

One more property of orthophosphoric acid (in high concentration) is its ability to cause burns. Vapors of this acid can cause nasal bleedings and atrophic processes in mucous a nose, and in certain cases can lead to destruction of teeth and change of a blood count.

Interaction of orthophosphoric acid

Interaction of orthophosphoric acid happens with:

  • Metals;
  • Main oxides;
  • Bases;
  • Ammonia;
  • Salts of weak acids.

Use of orthophosphoric acid

Orthophosphoric acid is widely used in various purposes:

  • For clarification from a rust of metal surfaces. Also it promotes further prevention of formation of corrosion;
  • As gumboil at the soldering;
  • In agriculture – for production of mineral fertilizers;
  • As a part of freon (in industrial freezing installations);
  • For researches in the field of molecular biology;
  • In production household synthetic cleaning, washing and emollients;
  • In the aviation industry (as a part of hydroliquids).

Use of orthophosphoric acid in medicine

Orthophosphoric acid is widely applied in stomatology when sealing teeth. It pickle an adamantine substance of tooth before the procedure.Ортофосфорная кислота - пищевая добавка Е338

The main complexity is the impossibility to check depth and extent of demineralization of dentine and enamel, and also its full removal before sealing. The remains of orthophosphoric acid can lead to decrease in durability of a bonding and formation of "an acid mine".

Also in insignificant quantities orthophosphoric acid is applied in compositions of bleaches to teeth.

Use of orthophosphoric acid (E338) in the food industry

E338 (orthophosphoric acid) concerns to group of antioxidants – the additives protecting food stuffs from oxidation and discoloration.

Orthophosphoric acid is applied to acidulation of food stuffs and drinks. It provides acute or acid taste. From natural podkislitel, for example, of citric acid, it is distinguished the low cost and ease of receiving that allows to use widely it at production:

  • Baking powders;
  • Processed cheeses;
  • Sausages;
  • Sahara;
  • The flavored drinks – Coca-Colas, Pepsi Cola, sprite.

Though orthophosphoric acid as nutritional supplement is allowed for use in the majority of the countries, as a result of many researches its harmful effects on an organism were established. So, it breaks acid-base balance, increasing its acidity. It can provoke development of various diseases, for example, of caries and osteoporosis.

The frequent use of orthophosphoric acid as a part of various products can cause digestion work disturbances – vomiting, nausea. Also prolonged use of products with this nutritional supplement can lead to a fastidium and loss of weight.

 
 
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