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433314

Sigma-Aldrich

Pyrophosphoric acid

technical grade

Synonym(s):

Diphosphoric acid

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About This Item

Linear Formula:
(HO)2P(O)OP(O)(OH)2
CAS Number:
2466-09-3
Molecular Weight:
177.98
EC Number:
219-574-0
MDL number:
MFCD00011343
UNSPSC Code:
12352106
PubChem Substance ID:
329756333
NACRES:
NA.21

grade

technical grade

Quality Level

200

Assay

≥94% (by NaOH, titration)

form

liquid
solid
waxy solid

technique(s)

ion chromatography: suitable

impurities

≥20% H3PO4

SMILES string

OP(O)(=O)OP(O)(O)=O

InChI

1S/H4O7P2/c1-8(2,3)7-9(4,5)6/h(H2,1,2,3)(H2,4,5,6)

InChI key

XPPKVPWEQAFLFU-UHFFFAOYSA-N

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Application

Pyrophosphoric acid (diphosphoric acid) may be used in the following processes:
  • As chemical activator in the preparation of activated carbon from leather waste.
  • To modify the surface of calcium hydroxyapatite in order to improve the surface functionality.
  • To modify the surface strontium aluminate nanoparticles potential applications in super-long time in vivo imaging.
  • Synthesis of bis(diisopropylammonium) dihydrogendiphosphate trihydrate (DIPAP).
  • Synthesis of novel 3-methoxybenzylammonium cation diphosphate.

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H302,H314

Hazard Classifications

Acute Tox. 4 Oral - Skin Corr. 1B

Storage Class Code

8B - Non-combustible corrosive hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Structure of synthetic calcium hydroxyapatite particles modified with pyrophosphoric acid.
Tanaka H, et al.
Journal of Colloid and Interface Science, 283(2), 609-612 (2005)
Crystal Structure, 31P, 13C NMR, IR Spectroscopy Investigations and Thermal Behavior of Bis (diisopropylammonium) dihydrogendiphosphate trihydrate.
Guelmami L and Jouini A.
Journal of Chemical Crystallography, 42(12), 1162-1169 (2012)
Surface modification of calcium hydroxyapatite with pyrophosphoric acid.
Tanaka H, et al.
Journal of Colloid and Interface Science, 269(2), 358-363 (2004)
Persistent luminescent nanoparticles for super-long time in vivo and in situ imaging with repeatable excitation.
Sun M, et al.
Journal of Luminescence, 145, 838-842 (2014)
Preparation and characterization of activated carbon from leather waste microwave-induced pyrophosphoric acid activation.
Kong J, et al.
Journal of Analytical and Applied Pyrolysis, 104, 710-713 (2013)
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