Home Categories Inorganic chemistry Pyrophosphoric acid
A6631412

Pyrophosphoric acid , 90% , 2466-09-3

Synonym(s):
Diphosphoric acid

CAS NO.:2466-09-3

Empirical Formula: H4O7P2

Molecular Weight: 177.98

MDL number: MFCD00011343

EINECS: 219-574-0

Pack Size Price Stock Quantity
100G RMB29.60 In Stock
500G RMB118.40 In Stock
2.5kg RMB433.60 In Stock
others     Enquire
Update time: 2022-07-08

PRODUCT Properties

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

Description and Uses

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

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.

Safety

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
3-9-21
HazardClass  8
PackingGroup  III
HS Code  28092000

RELATED PRODUCTS