CAS 7758-16-9 Disodium pytophosphate - Materials / Alfa Chemistry

NAVIGATION

Disodium pytophosphate

PRICE INQUIRY

Catalog Number

ACM7758169-3

CAS Number

7758-16-9

Product Name

Disodium pytophosphate

Structure

Category

Electrolytes

Synonyms

DISODIUM PYROPHOSPHATE;disodium pytophosphate;DI-SODIUM DIHYDROGEN PYROPHOSPHATE;Diphosphoric acid disodium salt;DSPP;SODIUM ACID PYROPHOSPHATE;SODIUM DIHYDROGEN PYROPHOSPHATE;SAPP

Description

Disodium pyrophosphate or sodium acid pyrophosphate is an inorganic compound consisting of sodium cations and pyrophosphate anion. It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food industry. When crystallised from water, it forms a hexahydrate, but it dehydrates above room temperature. Pyrophosphate is a polyvalent anion with a high affinity for polyvalent cations, e.g. Ca2+.Disodium pyrophosphate is produced by heating sodium dihydrogen phosphate:2 NaH2PO4 → Na2H2P2O7 + H₂O

IUPAC Name

disodium [hydroxy(oxido)phosphoryl] hydrogen phosphate

Molecular Weight

221.94

Molecular Formula

H2Na2O7P2

Canonical SMILES

OP(=O)([O-])OP(=O)(O)[O-].[Na+].[Na+]

InChI Key

GYQBBRRVRKFJRG-UHFFFAOYSA-L

Melting Point

988ºC

Purity

N/A

Density

2.311 g/cm³ (25ºC)

Appearance

White powder

Application

Disodium pyrophosphate serves multiple purposes across various industries, primarily in food processing and dental care. Known for its solubility and stability, this compound is frequently utilized as a leavening acid in baking to enhance the texture and volume of baked goods. It also acts as a chelating agent, preventing discoloration in processed potatoes by binding to iron. Its ability to adjust pH, maintain color, and improve the water-holding capacity of food makes it ideal for use in canned seafood, cured meats, and other processed foods. Additionally, its role in dental care products helps prevent tartar formation. Beyond food applications, disodium pyrophosphate is valued for its effectiveness as a pH regulator and for enhancing the flow properties of flour.

EC Number

231-835-0

Exact Mass

221.90700

Log P

0.06480

Safety Description

24/25

Stability

Stable.

Storage Conditions

-70ºC