Diphosphoric acid

Basic Information

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CAS Number

2466-09-3

Molecular Formula

H4O7P2

Molecular Weight

177.97 g/mol

Basic Physical Properties

Melting Point

61 ºC

Boiling Point

°Cat760mmHg

Density

2.4300

SMILES

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

InChI

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

InChIKey

XPPKVPWEQAFLFU-UHFFFAOYSA-N

LogP

-0.8116000000000001

Topological Polar Surface Area

124.29000000000002 Å²

Hydrogen Bond Donor/Acceptor

4 / 7

Complexity

147

Safety Information

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GHS Hazard Pictograms

H302

H314

Hazard Statement

H302 Harmful if swallowed
Acute toxicity, oral

H314 Causes severe skin burns and eye damage
Skin corrosion/irritation

Hazard Class

Class 8 Class 8

Sensitiveness

Sensitive to humidity

Synonyms & References

English

Pyrophosphoric acid
DTXSID4075035
UNII-4E862E7GRQ
CHEMBL1160571
PYROPHOSPHORIC ACID [WHO-DD]
[(HO)2P(O)OP(O)(OH)2]
PYROPHOSPHORIC ACID [MI]
4E862E7GRQ
phosphono dihydrogen phosphate
33943-49-6
2466-09-3
NCIStruc1_000506
Diphosphorsaeure
1,5-dihydrido-2,4-dihydroxido-2,4-dioxido-1,3,5-trioxy-2,4-diphosphy-(5)catena
(P2O74-)Diphosphate
BDBM50147591
Pyrophosphoric acid, Vetec(TM) reagent grade, 94%
C00013
Phosphonooxyphosphonic acid
CCG-37688
Oxy-1,1-diphosphonic acid
J-015622
NCGC00013687-03
AKOS015856732
NCGC00013687-02
XPPKVPWEQAFLFU-UHFFFAOYSA-N
(4-)Diphosphoric acid ion
CHEBI:29888
DIPHOSPHORIC-ACID
NSC289196
NSC-289196

MDL Number

MFCD00011343

Customs Code

2809201900

FAQ

What are the physical and chemical properties of diphosphoric acid (CAS: 2466-09-3)?

Diphosphoric acid (CAS: 2466-09-3) is a colorless to slightly yellowish crystalline solid. It has a molecular weight of approximately 97.94 g/mol and a high solubility in water. It is reactive, particularly in acidic conditions, and can form salts and esters. Diphosphoric acid is also known for its ability to act as a Lewis acid and to catalyze various reactions.

How is diphosphoric acid (CAS: 2466-09-3) typically synthesized?

Diphosphoric acid is typically synthesized by the dehydration of orthophosphoric acid using heat or anhydrous conditions. This process is carried out under careful control to prevent the further dehydration to produce phosphorus pentoxide. The reaction can be catalyzed by various means, and the purity and selectivity of the product can be enhanced through careful process control.

What industries use diphosphoric acid (CAS: 2466-09-3)?

Diphosphoric acid (CAS: 2466-09-3) is used in various industries including pharmaceuticals, where it serves as a buffer and in analytical chemistry. It is also used in the production of polymers, sensors, and semiconductor materials due to its ability to act as a catalyst and its reactivity with various substrates.

What precautions should be taken when handling diphosphoric acid (CAS: 2466-09-3)?

When handling diphosphoric acid (CAS: 2466-09-3), it is important to use appropriate personal protective equipment (PPE) such as gloves and safety glasses. Work should be conducted in a well-ventilated area or a fume hood. Spills should be cleaned up using appropriate methods, and it is recommended to consult the Safety Data Sheet (SDS) for specific instructions on handling and disposal. Diphosphoric acid should be stored in a cool, dry place, away from heat sources and incompatible materials.