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

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Disodium pytophosphate

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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