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The parent pyrophosphates are derived from partial or complete neutralization of pyrophosphoric acid. The pyrophosphate bond is also sometimes referred to as a phosphoanhydride bond, a naming convention which emphasizes the loss of water that occurs when two phosphates form a new P−O−P bond, and which mirrors the nomenclature for anhydrides ...
Pyrophosphoric acid, also known as diphosphoric acid, is the inorganic compound with the formula H 4 P 2 O 7 or, more descriptively, [(HO) 2 P(O)] 2 O. Colorless and odorless, it is soluble in water, diethyl ether, and ethyl alcohol.
Pyrophosphoric acid. In chemistry , a phosphoric acid , in the general sense, is a phosphorus oxoacid in which each phosphorus (P) atom is in the oxidation state +5, and is bonded to four oxygen (O) atoms, one of them through a double bond , arranged as the corners of a tetrahedron .
Disodium pyrophosphate or sodium acid pyrophosphate (SAPP) [1] is an inorganic compound with the chemical formula Na 2 H 2 P 2 O 7. It consists of sodium cations (Na +) and dihydrogen pyrophosphate anions (H 2 P 2 O 2− 7). It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food ...
Phosphoric acid forms esters, called organophosphates. [17] The name "orthophosphoric acid" can be used to distinguish this specific acid from other "phosphoric acids", such as pyrophosphoric acid. Nevertheless, the term "phosphoric acid" often means this specific compound; and that is the current IUPAC nomenclature.
Tetrasodium pyrophosphate, also called sodium pyrophosphate, tetrasodium phosphate or TSPP, is an inorganic compound with the formula Na 4 P 2 O 7.As a salt, it is a white, water-soluble solid.
According to the OED, pyrophosphoric acid is obtained by heating phosphoric acid, and the prefix pyro-refers to that heat (πυρ, pur, means fire in Greek). Pyrophosphate is the only molecule which contains bridging oxygen. (user jyoti)--Ben 10:55, 14 August 2007 (UTC) My understanding of "pyro-" is as follows.
The dihydrate, sometimes termed CPPD, can be formed by the reaction of pyrophosphoric acid with calcium chloride: [citation needed] CaCl 2 + H 4 P 2 O 7 (aq) → Ca 2 P 2 O 7 ·2 H 2 O + HCl. The anhydrous forms can be prepared by heating dicalcium phosphate: [2] 2 CaHPO 4 → Ca 2 P 2 O 7 + H 2 O