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Pyrophosphoric acid

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Pyrophosphoric acid

Molecular formula: H4O7P2 CAS# 2466-09-3
Categories: Inorganic acids
Names
English:
Diphosphoric acid(IUPAC)
Pyrophosphoric acid [Wiki]
μ-oxido-bis(dihydroxidooxidophosphorus)(IUPAC)
Русский:
Гептаоксодифосфат(V) водорода(IUPAC)
Дифосфорная кислота [Wiki]
пирофосфорная кислота
German:
Diphosphorsäure
Pyrophosphorsäure
Español:
Fosfato (V) de hidrógeno
Ácido difosfórico
Ácido pirofosfórico [Wiki]
French:
Acide phosphonooxyphosphonique(IUPAC)
Acide pyrophosphorique [Wiki]
Italiano:
Acido pirofosforico [Wiki]
acido difosforico(IUPAC)
acido piro-fosforico
日本語:
二リン酸 [Wiki]
中文:
焦磷酸 [Wiki]

Variants of the formula:

H4P2O7
H(+)4P(+5)2O(-2)7
HO/P`|O|<_(A80,L1.2)OH>\O/P`|O|<_(A80,L1.2)OH>\OH
HO-P`|O|<|OH>-O-P`|O|<|OH>-OH
HO_(A-15,d-)P`|O|<_(A100,w+)HO>\O/P`|O|<_(A80,w+)OH>_(A15,d+)OH
OH|P<`\HO>`/O/\O/P</OH>\O`\`|OH
Elemental composition
Can't show the diagram.
Symbol Element Atomic weight Number of atoms Mass percent

Reactions in which Pyrophosphoric acid is involved

  • P4O10 + 4H2O -> 2H4P2O7
  • 2H3PO4 "150^oC"--> H4P2O7 + H2O
  • 8H3PO4 + P4O10 "100^oC"--> 6H4P2O7
  • H4P2O7 "300^oC"--> 2HPO3 + H2O
  • H4P2O7 + H2O "100^oC"-->"HNO3" 2H3PO4