Chemical Property of Pyrophosphoric acid
Chemical Property:
- Appearance/Colour:White to very pale yellow glassy solid
- Melting Point:61 °C
- PKA:0.99±0.10(Predicted)
- PSA：143.91000
- Density:2.43 g/cm3
- LogP:-0.81160
- Storage Temp.:-20°C, Hygroscopic
- Solubility.:DMSO (Soluble)
- Water Solubility.:709g/100mL H2O (23°C); soluble alcohol, ether [MER06]
- XLogP3:-3.2
- Hydrogen Bond Donor Count:4
- Hydrogen Bond Acceptor Count:7
- Rotatable Bond Count:2
- Exact Mass:177.94322646
- Heavy Atom Count:9
- Complexity:147
- Purity/Quality:
-
99%, *data from raw suppliers
Pyrophosphoric Acid *data from reagent suppliers
Safty Information:
- Pictogram(s):
C
- Hazard Codes:C
- Statements:
22-34
- Safety Statements:
26-36/37/39-45
- MSDS Files:
-
SDS file from LookChem
Total 1 MSDS from other Authors
Useful:
- Chemical Classes:Toxic Gases & Vapors -> Acids, Inorganic
- Canonical SMILES:OP(=O)(O)OP(=O)(O)O
- Recent ClinicalTrials:Pneumococcal Conjugate Vaccine Followup
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Description
Pyrophosphoric acid, also known under the name
diphosphoric acid, is colorless, odorless, hygroscopic
and is soluble in water, diethyl ether and ethyl alcohol.
It is produced from phosphoric acid by dehydration.
Pyrophosphoric acid slowly hydrolyzes in the presence
of water into phosphoric acid.
H4P2O7 +H2O?2H3PO4
Upon heating, phosphoric acid loses water, being
converted successively, and to some extent concurrently,
into the pyro- and meta-acids:
2H3PO4?H4P2O7 +H2O
nH3PO4?(HPO3)n + [H2O]n
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Physical properties
Colorless needles or liquid; hygroscopic. Crystallizes in two anhydrous forms: a metastable form melting at 54.3°C and a second and more stable form melting at 71.5°C; extremely soluble in cold water, reacting very slowly to form phosphoric acid; decomposing much faster in hot water; very soluble in alcohol and ether.
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Uses
Catalyst, manufacture of organic phosphate
esters, metal treatment, stabilizer for organic per-
oxides. Pyrophosphoric Acid has been shown to enhance the rate of pyrophosphate hydrolysis by nonenzymatic catlysis and by inorganic pyrophoshatase. Pyrophosphoric Acid can be used for the preparation of vanadyl pyrophosphato methoxide cluster anion. Pyrophosphoric Acid is used in anion binding of inorganic phosphates due to is ability to form complexes.
