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Pyrophosphoric acid

Pyrophosphoric acid Suppliers list
Company Name: Henan DaKen Chemical CO.,LTD.
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Products Intro: Product Name:Pyrophosphoric acid
CAS:2466-09-3
Purity:99% Package:100g,500g,1KG,10KG,100KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
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Products Intro: CAS:2466-09-3
Purity:99% Package:500G;1KG;5KG;25KG
Company Name: Mainchem Co., Ltd.
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Products Intro: Product Name:Pyrophosphoric acid
CAS:2466-09-3
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Products Intro: Product Name:Pyrophosphoric Acid
CAS:2466-09-3
Purity:90+% Package:25g,5g
Company Name: Meryer (Shanghai) Chemical Technology Co., Ltd.  
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Products Intro: Product Name:Pyrophosphoric acid
CAS:2466-09-3
Purity:45% Package:250g Remarks:E15005
Pyrophosphoric acid Basic information
Preparation Reactions
Product Name:Pyrophosphoric acid
Synonyms:PYROPHOSPHORIC ACID, 90+%;Diphosphoric(V) acid;DIPHOSPHORIC ACID;Pyrophosphoric acidDiphosphoric acid;Pyrophosphoric acid technical grade;Pyrophosphoric acid Vetec(TM) reagent grade, 94%;PYROPHOSPHORIC ACID;Pyrophosphoric acid syrupy
CAS:2466-09-3
MF:H4O7P2
MW:177.975082
EINECS:219-574-0
Product Categories:API intermediates
Mol File:2466-09-3.mol
Pyrophosphoric acid Structure
Pyrophosphoric acid Chemical Properties
Melting point 61 °C
form white crystals
Water Solubility 709g/100mL H2O (23°C); soluble alcohol, ether [MER06]
Merck 13,8098
CAS DataBase Reference2466-09-3(CAS DataBase Reference)
EPA Substance Registry SystemDiphosphoric acid(2466-09-3)
Safety Information
Hazard Codes C
Risk Statements 22-34
Safety Statements 26-36/37/39-45
RIDADR UN 3260 8/PG 2
WGK Germany 3
RTECS JL6672500
3-9-21
HazardClass 8
PackingGroup III
HS Code 28092000
MSDS Information
ProviderLanguage
Diphosphoric acid English
SigmaAldrich English
Pyrophosphoric acid Usage And Synthesis
PreparationPyrophosphoric acid may be prepared by heating orthophosphoric acid at 215°C:
2H3PO4 → H4P2O7 + H2O
The acid solution in pure form can be obtained by ion exchange, passing an aqueous solution of sodium pyrophosphate, Na4P2O7, through a suitable cation exchange column.
ReactionsThe acid has four replacable H+ ions. Its dissociation constants indicate that two H+ ions are strongly acidic while the other two protons are weakly acidic. The first dissociation constant especially is very large:
H4P2O7 + H2O ↔ H3O+ + H3P2O7¯          Ka1 ~ 10–1
H3P2O7¯+ H2O ↔ H3O+ + H2P2O72–         Ka2 ~ 1.5x10–2
PHOSPHORIC ACID, PYRO 701H2P2O72¯ + H2O ↔ H3O+ + HP2O73–      Ka3 ~ 2.7x10–7
HP2O73¯ + H2O ↔ H3O+ + P2O74¯          Ka4 ~ 2.4x10–10
Pyrophosphoric acid forms acid salts, such as NaH3P2O7 and Na2H2P2O7.
Chemical PropertiesWhite to very pale yellow glassy solid
UsesCatalyst, manufacture of organic phosphate esters, metal treatment, stabilizer for organic per- oxides.
DefinitionChEBI: An acyclic phosphorus acid anhydride obtained by condensation of two molecules of phosphoric acid.
Tag:Pyrophosphoric acid(2466-09-3) Related Product Information
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