Disodium pytophosphate

• CAS: 7758-16-9
• Catalog Number: ACM7758169
• Category: Metal & Ceramic Materials
• Molecular Weight: 221.94
• Molecular Formula: H2Na2O7P2
• 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
• Synonyms: DISODIUM PYROPHOSPHATE;disodium pytophosphate;DI-SODIUM DIHYDROGEN PYROPHOSPHATE;Diphosphoric acid disodium salt;DSPP;SODIUM ACID PYROPHOSPHATE;SODIUM DIHYDROGEN PYROPHOSPHATE;SAPP
• IUPAC Name: disodium [hydroxy(oxido)phosphoryl] hydrogen phosphate
• Canonical SMILES: OP(=O)([O-])OP(=O)(O)[O-].[Na+].[Na+]
• InChI Key: GYQBBRRVRKFJRG-UHFFFAOYSA-L
• Melting Point: 988ºC
• Density: 2.311 g/cm³ (25ºC)
• Appearance: White powder
• EC Number: 231-835-0
• Exact Mass: 221.90700
• H-Bond Acceptor: 7
• H-Bond Donor: 2
• HS Code: 2835399000
• LogP: 0.06480
• PSA: 149.57
• Safety Description: 24/25
• Stability: Stable.
• Storage Conditions: -70ºC
• WGK Germany: 2