Calcium phosphate

Calcium phosphate

Calcium phosphate is the name given to a family of minerals containing calcium ions (Ca2+) together with orthophosphates (PO43-), metaphosphates or pyrophosphates (P2O74-) and occasionally hydrogen or hydroxide ions. Seventy percent of bone is made up of hydroxylapatite, a calcium phosphate mineral. Tooth enamel is also largely calcium phosphate.

Uses

For the production of phosphoric acid and fertilizers, for example in the Odda process. Overuse of certain forms of calcium phosphate can lead to nutrient-containing surface runoff and subsequent adverse effects upon receiving waters such as algal blooms and eutrophication.

Calcium phosphate is also a raising agent, with E number E341. It is also used in cheese products.

It is also used as a nutritional supplement. There is some debate about the different bioavailabilities of the different calcium salts.

It is used in a variety of dental products for remineralization.

Another practical application of the compound is its use in gene transfection of cells.Fact|date=January 2008 It is not too well understood, but the calcium phosphate precipitate and DNA form a complex that is thought to help the DNA enter the cell.

Calcium phosphate compounds

* Calcium dihydrogen phosphate, E341(i): Ca(H2PO4)2
* Calcium hydrogen phosphate, E341(ii): CaHPO4
* Tricalcium phosphate (or tricalcic phosphate), E341(iii): Ca3(PO4)2
** Calcium phosphate Ca3(PO4)2

References


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Look at other dictionaries:

  • calcium phosphate — n any of various phosphates of calcium: as a) the phosphate CaHPO4 used in pharmaceutical preparations and animal feeds b) a naturally occurring phosphate of calcium Ca5(F,Cl,OH,1/2CO3)(PO4)3 that contains other elements or radicals and is the… …   Medical dictionary

  • calcium phosphate — n. any of a number of phosphates of calcium found in bones, teeth, etc. and used in medicine and in the manufacture of enamels, glass, cleaning agents, etc …   English World dictionary

  • calcium phosphate — noun a phosphate of calcium; a main constituent of animal bones • Hypernyms: ↑phosphate, ↑orthophosphate, ↑inorganic phosphate * * * noun 1. : an orthophosphate of calcium: as a. : one of the three simple orthop …   Useful english dictionary

  • calcium phosphate — noun Date: 1869 any of various phosphates of calcium: as a. the phosphate CaH4P2O8 used as a fertilizer and in baking powder b. the phosphate CaHPO4 used in pharmaceutical preparations and animal feeds c. the phosphate Ca3P2O8 used as a… …   New Collegiate Dictionary

  • calcium phosphate — cal′cium phos′phate n. chem. nut a phosphate of calcium, used as a fertilizer, food additive, and in baking powder • Etymology: 1865–70 …   From formal English to slang

  • calcium phosphate — any of several phosphates of calcium occurring naturally in some rocks and in animal bones, used as a fertilizer and food additive as well as in baking powder and dentifrices. [1865 70] * * * …   Universalium

  • calcium phosphate — noun The calcium salt or phosphoric acid, Ca(PO), or of several related acids; it is the main mineral of bone …   Wiktionary

  • calcium phosphate — /kælsiəm ˈfɒsfeɪt/ (say kalseeuhm fosfayt) noun any of several phosphates of calcium occurring naturally in some rocks and in animal bones, and used in medicine, industry, etc …  

  • Amorphous calcium phosphate — (ACP) is a substance used as a dental treatment. Calcium and phosphate are natural building blocks of teeth, and when present in insufficient amounts, there can be sensitivity after procedures such as dental bleaching or professional dental… …   Wikipedia

  • tribasic calcium phosphate — I. noun see calcium phosphate II. noun see calcium phosphate …   Useful english dictionary

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