- An anhydride of phosphoric acid obtained by heating phosphoric acid to 213°C; it forms pyrophosphates with bases, and its esters are important in energy metabolism and in biosynthesis.
* * *py·ro·phos·pho·ric acid -fäs-.fȯr-ik-, -.fär-; -.fäs-f(ə-)rik- n a crystalline acid H4P2O7 that is formed when orthophosphoric acid is heated or that is prepared in the form of salts by heating acid salts of orthophosphoric acid
* * *py·ro·phos·pho·ric ac·id (pi″ro-fos-forґik) the ester-linked dimeric form of phosphoric acid, H4P2O7. See also phosphoric acid.
Medical dictionary. 2011.
Look at other dictionaries:
pyrophosphoric acid — [pī΄rə fäs fôr′ik] n. [ PYRO + PHOSPHORIC] a viscous liquid acid, H4P2O7, which crystallizes when left standing at ordinary temperatures and is easily converted to orthophosphoric acid upon dilution with water … English World dictionary
Pyrophosphoric acid — Chembox new ImageFile = Pyrophosphoric acid 2D.png ImageName = Chemical structure of pyrophosphoric acid ImageFile1 = Pyrophosphoric acid 3D vdW.png ImageName1 = 3D model of pyrophosphoric acid IUPACName = diphosphoric acid μ oxido… … Wikipedia
pyrophosphoric acid — noun Etymology: International Scientific Vocabulary Date: 1832 a crystalline acid H4P2O7 formed when orthophosphoric acid is heated or prepared in the form of salts by heating acid salts of orthophosphoric acid … New Collegiate Dictionary
pyrophosphoric acid — noun a) A syrupy liquid formed by the dehydration of phosphoric acid; its salts, the pyrophosphates, are used in medicine. b) The acid formed by removing a molecule of water from two molecules of phosphoric acid, HPO; this reaction slowly reverse … Wiktionary
pyrophosphoric acid — noun a solid acid formed by reactions of orthophosphoric acid • Hypernyms: ↑polyphosphoric acid … Useful english dictionary
pyrophosphoric acid — /ˌpaɪroʊfɒsfɒrɪk ˈæsəd/ (say .puyrohfosforik asuhd) noun the acid H4P2O7, formed by the union of one molecule of phosphorus pentoxide with two molecules of water. It is a water soluble, crystalline powder … Australian English dictionary
pyrophosphoric acid — /puy roh fos fawr ik, for , puy /, Chem. a crystalline, water soluble powder, H4P2O7, formed by the union of one molecule of phosphorus pentoxide with two molecules of water. [1865 70; PYRO + PHOSPHORIC] * * * … Universalium
pyrophosphoric acid — py′ro•phos•phor′ic ac′id [[t]ˈpaɪ roʊ fɒsˈfɔr ɪk, ˈfɒr , ˌpaɪ [/t]] n. chem. a crystalline, water soluble powder, H4P2O7, used as a catalyst • Etymology: 1865–70 … From formal English to slang
pyrophosphoric — adjective of, or relating to pyrophosphoric acid or its derivatives … Wiktionary
pyrophosphoric — adj. pertaining to pyrophosphoric acid (Chemistry) … English contemporary dictionary