Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Pyrophosphoric acid, also known as diphosphoric acid, is the inorganic compound with the formula H4P2O7 or, more descriptively, [(HO)2P(O)]2O. Colorless and odorless, it is soluble in water, diethyl ether, and ethyl alcohol. The anhydrous acid crystallizes in two polymorphs, which melt at 54.3 and 71.5 °C. The compound is a component of polyphosphoric acid, an important source of phosphoric acid.[1] Anions, salts, and esters of pyrophosphoric acid are called pyrophosphates.
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Pyrophosphoricacid, also known as diphosphoric acid, is the inorganic compound with the formula H4P2O7 or, more descriptively, [(HO)2P(O)]2O. Colorless...
specific acid from other "phosphoric acids", such as pyrophosphoricacid. Nevertheless, the term "phosphoric acid" often means this specific compound;...
phosphoric acids, it is the next polyphosphoric acid after pyrophosphoricacid, H4P2O7, also called diphosphoric acid. Compounds such as ATP (adenosine triphosphate)...
abbreviated GDP, is a nucleoside diphosphate. It is an ester of pyrophosphoricacid with the nucleoside guanosine. GDP consists of a pyrophosphate group...
Pyrophosphoricacid, H 4P 2O 7 (or (HO) 2P–O–P(OH) 2), with four acid hydrogens. Forms pyrophosphates. Triphosphoric acid (or tripolyphosphoric acid)...
other related acids with the general formula H2O·(SO3)x though none can be isolated. Pyrophosphoricacid Disulfurous acid Oleum Sulfuric acid Sulfur oxoacid...
abbreviated UDP, is a nucleotide diphosphate. It is an ester of pyrophosphoricacid with the nucleoside uridine. UDP consists of the pyrophosphate group...
is also referred to as a high-energy phosphate bond. Pyrophosphoricacid is a tetraprotic acid, with four distinct pKa's: H4P2O7 ⇌ [H3P2O7]− + H+, pKa1...
An oxyacid, oxoacid, or ternary acid is an acid that contains oxygen. Specifically, it is a compound that contains hydrogen, oxygen, and at least one...
isohypophosphoric acid, HPO(OH)-O-PO2(OH); pyrophosphoricacid H2P2O7 and pyrophosphorous acid. Hypophosphoric acid is unstable in hot hydrochloric acid, in 4 M...
pyrophosphate, dTPP) is a nucleotide diphosphate. It is an ester of pyrophosphoricacid with the nucleoside thymidine. dTDP consists of the pyrophosphate...
first, during thermal decomposition, phosphoric acid is formed. This reacts to form pyrophosphoricacid, which, when in its condensed phase, acts to block...
abbreviated CDP, is a nucleoside diphosphate. It is an ester of pyrophosphoricacid with the nucleoside cytidine. CDP consists of the pyrophosphate group...
commercially important, and three of them, hypophosphorous acid, phosphorous acid, and phosphoric acid, are particularly important. The PN molecule is considered...
liquid droplets of phosphoric acid: P4O10 + 6 H2O → 4 H3PO4 (also forms polyphosphoric acids such as pyrophosphoricacid, H4P2O7) Since an atom of phosphorus...
dihydrate, sometimes termed CPPD, can be formed by the reaction of pyrophosphoricacid with calcium chloride:[citation needed] CaCl2 + H4P2O7(aq) → Ca2P2O7·2...
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