Pyrophosphoric acid
- CAS No.
- 2466-09-3
- Chemical Name:
- Pyrophosphoric acid
- Synonyms
- DIPHOSPHORIC ACID;eizh;iphosphoricaci;Pyrophosphorsure;PYROPHOSPHORIC ACID;Diphosphoric(V) acid;inorganpyrophosphate;PYROPHOSPHORIC ACID, 90+%;Pyrophosphoric acid (8CI);PYROPHOSPHORIC ACID, TECH.
- CBNumber:
- CB0740227
- Molecular Formula:
- H4O7P2
- Molecular Weight:
- 177.98
- MOL File:
- 2466-09-3.mol
- MSDS File:
- SDS
- Modify Date:
- 2024/10/24 21:11:45
| Melting point | 61 °C |
|---|---|
| Density | approximate 1.9g/ml (25℃) |
| storage temp. | -20°C, Hygroscopic |
| solubility | DMSO (Soluble) |
| pka | 0.99±0.10(Predicted) |
| form | white crystals |
| color | white crystals, crystalline |
| PH | pKa1= 0.86, pKa2 = 1.76, pKa3 = 5.88, pKa4 = 8.14(25℃) |
| Water Solubility | 709g/100mL H2O (23°C); soluble alcohol, ether [MER06] |
| Merck | 13,8098 |
| Stability | Hygroscopic, Moisture Sensitive |
| InChIKey | XPPKVPWEQAFLFU-UHFFFAOYSA-N |
| CAS DataBase Reference | 2466-09-3(CAS DataBase Reference) |
| EPA Substance Registry System | Diphosphoric acid (2466-09-3) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS05,GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H302-H314 | |||||||||
| Precautionary statements | P280-P305+P351+P338-P310 | |||||||||
| 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 | |||||||||
| F | 3-9-21 | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | III | |||||||||
| HS Code | 28092000 | |||||||||
| NFPA 704 |
|
Pyrophosphoric acid Chemical Properties,Uses,Production
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
Chemical Properties
White to very pale yellow glassy solid
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.
Uses
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.
Preparation
According to early investigators, the pyro-acid is
formed as low as 100 °C, and the conversion is complete
between 255 and 260 °C. Phosphorous oxychloride
reacts with phosphoric acid in the following manner:
5H3PO4 + POC13?3H4P2O7 + 3HC1
A mixture of the ortho- and meta-acids may be
condensed together to form the pyro-acid by heating on the water bath:
nH3PO4 +[HPO3]n?[H4P2O7]n
Definition
ChEBI: An acyclic phosphorus acid anhydride obtained by condensation of two molecules of phosphoric acid.
Pyrophosphoric acid Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | Inquiry |
|---|---|---|---|---|---|
| Paresh Impex | 08048611351 | Mumbai, India | 10 | 58 | Inquiry |
| Hebei Weibang Biotechnology Co., Ltd | +8617732866630 | China | 18154 | 58 | Inquiry |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | China | 20287 | 58 | Inquiry |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | China | 21634 | 55 | Inquiry |
| Chongqing Chemdad Co., Ltd | +86-023-6139-8061 +86-86-13650506873 | China | 39894 | 58 | Inquiry |
| Hebei Mojin Biotechnology Co., Ltd | +86 13288715578 +8613288715578 | China | 12840 | 58 | Inquiry |
| Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418671 +8618949823763 | China | 34553 | 58 | Inquiry |
| Wuhan Fortuna Chemical Co., Ltd | +86-027-59207850 | China | 5978 | 58 | Inquiry |
| Baoji Guokang Healthchem co.,ltd | +8615604608665 15604608665 | CHINA | 9414 | 58 | Inquiry |
| Dayang Chem (Hangzhou) Co.,Ltd. | 571-88938639 +8617705817739 | China | 52849 | 58 | Inquiry |