Pyrophosphoric acid

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Pyrophosphoric acid

Preparation Reactions

Product Name: 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
Formula Weight: 177.98
MOL File: 2466-09-3.mol

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Pyrophosphoric acid Property

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)

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Safety

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

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

H314Causes severe skin burns and eye damage

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P310Immediately call a POISON CENTER or doctor/physician.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 433314
Product name: Pyrophosphoric acid
Purity: technical grade
Packaging: 100g
Price: $83
Updated: 2024/03/01

TRC

Product number: P997700
Product name: Pyrophosphoric acid
Packaging: 5g
Price: $120
Updated: 2021/12/16

Usbiological

Product number: 166092
Product name: Pyrophosphoric Acid
Packaging: 5g
Price: $403
Updated: 2021/12/16

Medical Isotopes, Inc.

Product number: 72225
Product name: Pyrophosphoric acid
Packaging: 5G
Price: $610
Updated: 2021/12/16

Medical Isotopes, Inc.

Product number: 72225
Product name: Pyrophosphoric acid
Packaging: 25g
Price: $675
Updated: 2021/12/16

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Pyrophosphoric acid Chemical Properties,Usage,Production

Preparation

Pyrophosphoric acid may be prepared by heating orthophosphoric acid at 215°C:
2H3PO4 → H4P2O7 + H2O
The acid solution in pure form can be obtained by ion exchange, passing an aqueous solution of sodium pyrophosphate, Na4P2O7, through a suitable cation exchange column.

Reactions

The acid has four replacable H+ ions. Its dissociation constants indicate that two H+ ions are strongly acidic while the other two protons are weakly acidic. The first dissociation constant especially is very large:
H4P2O7 + H2O ↔ H3O+ + H3P2O7¯ Ka1 ~ 10–1
H3P2O7¯+ H2O ↔ H3O+ + H2P2O72– Ka2 ~ 1.5x10–2
PHOSPHORIC ACID, PYRO 701H2P2O72¯ + H2O ↔ H3O+ + HP2O73– Ka3 ~ 2.7x10–7
HP2O73¯ + H2O ↔ H3O+ + P2O74¯ Ka4 ~ 2.4x10–10
Pyrophosphoric acid forms acid salts, such as NaH3P2O7 and Na2H2P2O7.

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.

Uses

Catalyst, manufacture of organic phosphate esters, metal treatment, stabilizer for organic per- oxides.

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

Phosphoric acid Phosphorus oxychloride Polyphosphoric acid

Preparation Products

IODOCYCLOHEXANE alcohol polyoxyethylene ether phosphoric monoester trihydric alcohol phosphate ester

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View Lastest Price from Pyrophosphoric acid manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD

Product: Pyrophosphoric acid 2466-09-3
Price: US $0.00/KG
Min. Order: 1KG
Purity: 98%min
Supply Ability: 30tons/month
Release date: 2023-01-11

Hebei Weibang Biotechnology Co., Ltd

Product: Pyrophosphoric acid 2466-09-3
Price: US $30.00-10.00/KG
Min. Order: 50KG
Purity: 99%
Supply Ability: 500000kg
Release date: 2024-10-24

Henan Fengda Chemical Co., Ltd

Product: Pyrophosphoric acid 2466-09-3
Price: US $8.00-1.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: g-kg-tons, free sample is available
Release date: 2024-04-03

2466-09-3, Pyrophosphoric acidRelated Search:

Stearic acid Folic acid Citric acid Ethyl 2-(Chlorosulfonyl)acetate Polyphosphoric acid Phosphorus pentoxide Ascoric Acid Sodium pyrophosphate Copper pyrophosphate Pyrophosphoric acid，tetrasodiumsalt Ferric pyrophosphate Potassium pyrophosphate NADH, disodium salt Sodium pyrophosphate decahydrate Nadph tetrasodium salt Sodium tripolyphosphate NAD+ Cocarboxylase

DIPHOSPHORIC ACID

PYROPHOSPHORIC ACID

Pyrophosphoric acid syrupy

PYROPHOSPHORIC ACID, TECH.

eizh

PYROPHOSPHORIC ACID, 90+%

Diphosphoric(V) acid

Pyrophosphoric acidDiphosphoric acid

Pyrophosphoric acid technical grade

Pyrophosphoric acid Vetec(TM) reagent grade, 94%

iphosphoricaci

inorganpyrophosphate

Pyrophosphoric acid (8CI)

Pyrophosphorsure

2466-09-3

2466-9-3

2466/9/3

206975

H4P2O7

HO2POOPOOH2

Synthetic Reagents

Inorganic Acids

API intermediates