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pyrophosphoric acid

[ pahy-roh-fos-fawr-ik, -for-, pahy- ]

noun

, Chemistry.
  1. a crystalline, water-soluble powder, H 4 P 2 O 7 , formed by the union of one molecule of phosphorus pentoxide with two molecules of water.


pyrophosphoric acid

/ ˌpaɪrəʊfɒsˈfɒrɪk /

noun

  1. a crystalline soluble solid acid formed by the reaction between one molecule of phosphorus pentoxide and two water molecules. Formula: H 4 P 2 O 7 See also polyphosphoric acid
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

pyrophosphoric acid

/ pī′rō-fŏs-fôrĭk /

  1. A viscous liquid used as a catalyst and in the manufacture of organic chemicals. Chemical formula: H 4 P 2 O 7 .
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Word History and Origins

Origin of pyrophosphoric acid1

First recorded in 1865–70; pyro- + phosphoric
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Example Sentences

While the secondary phosphates, on heating, give salts of pyrophosphoric acid, the primary phosphates yield salts of metaphosphoric acid.

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