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- Q411092 subject Q6290684.
- Q411092 subject Q7158387.
- Q411092 subject Q7237038.
- Q411092 subject Q8220201.
- Q411092 abstract "Pyrophosphoric acid, also known under the name diphosphoric acid, is colorless, odorless, hygroscopic and is soluble in water, diethyl ether, and ethyl alcohol. The anhydrous acid has two different forms, which melt at 54.3°C and 71.5°C. It is best prepared by ion exchange from sodium pyrophosphate or by reacting hydrogen sulfide with lead pyrophosphate. When phosphoric acid is dehydrated pyrophosphoric acid is produced as one of the products. When molten pyrophosphoric acid rapidly forms an equilibrium mixture of phosphoric acid, pyrophosphoric acid and polyphosphoric acids. The percentage by weight of pyrophosphoric acid is around 40% and it is difficult to recrystallise from the melt. In aqueous solution pyrophosphoric acid like all polyphosphoric acids hydrolyses and eventually an equilibrium is established between phosphoric acid pyrophosphoric acid and polyphosphoric acids. When highly diluted an aqueous solution of pyrophosphoric acid contains only phosphoric acid. H4P2O7 + H2O 15px 2H3PO4Pyrophosphoric acid is a medium strong inorganic acid. Anions, salts, and esters of pyrophosphoric acid are called pyrophosphates.While pyrophosporic acid is corrosive, it is not known to be otherwise toxic.".
- Q411092 iupacName "Diphosphoric acid".
- Q411092 iupacName "μ-oxido-bis(dihydroxidooxidophosphorus)".
- Q411092 thumbnail Pyrophosphoric-acid-2D.png?width=300.
- Q411092 wikiPageExternalLink summary.cgi?sid=217793.
- Q411092 wikiPageWikiLink Q101487.
- Q411092 wikiPageWikiLink Q103230.
- Q411092 wikiPageWikiLink Q11158.
- Q411092 wikiPageWikiLink Q11165.
- Q411092 wikiPageWikiLink Q1183091.
- Q411092 wikiPageWikiLink Q12370.
- Q411092 wikiPageWikiLink Q153.
- Q411092 wikiPageWikiLink Q156.
- Q411092 wikiPageWikiLink Q185253.
- Q411092 wikiPageWikiLink Q202218.
- Q411092 wikiPageWikiLink Q2031968.
- Q411092 wikiPageWikiLink Q216678.
- Q411092 wikiPageWikiLink Q2823316.
- Q411092 wikiPageWikiLink Q290828.
- Q411092 wikiPageWikiLink Q36496.
- Q411092 wikiPageWikiLink Q417398.
- Q411092 wikiPageWikiLink Q418504.
- Q411092 wikiPageWikiLink Q559082.
- Q411092 wikiPageWikiLink Q6290684.
- Q411092 wikiPageWikiLink Q6478447.
- Q411092 wikiPageWikiLink Q7158387.
- Q411092 wikiPageWikiLink Q7237038.
- Q411092 wikiPageWikiLink Q80863.
- Q411092 wikiPageWikiLink Q8220201.
- Q411092 iupacname "Diphosphoric acid".
- Q411092 iupacname "μ-oxido-bis".
- Q411092 type ChemicalCompound.
- Q411092 type ChemicalSubstance.
- Q411092 type ChemicalObject.
- Q411092 type Thing.
- Q411092 type Q11173.
- Q411092 comment "Pyrophosphoric acid, also known under the name diphosphoric acid, is colorless, odorless, hygroscopic and is soluble in water, diethyl ether, and ethyl alcohol. The anhydrous acid has two different forms, which melt at 54.3°C and 71.5°C. It is best prepared by ion exchange from sodium pyrophosphate or by reacting hydrogen sulfide with lead pyrophosphate. When phosphoric acid is dehydrated pyrophosphoric acid is produced as one of the products.".
- Q411092 label "Pyrophosphoric acid".
- Q411092 depiction Pyrophosphoric-acid-2D.png.