1.0 2010-04-08 22:10:41 UTC 2025-11-18 23:44:07 UTC FDB013382 Sodium diphosphate (Na4(P2O7)) It is used in foods as a buffering agent, pH control agent, alkalinity source, dispersing agent, protein modifier, coagulant and sequestrant Anhydrous tetrasodium pyrophosphate Diphosphoric acid, sodium salt (1:4) Diphosphoric acid, tetrasodium salt Phosphotex Pyrophosphoric acid tetrasodium salt Sodium diphosphate tetrabasic Sodium pyrophosphate tetrabasic Tetrasodium diphosphate, 9CI Tetrasodium pyrophosphate, 8CI Tetrasodium pyrophosphate, anhydride Tetrasodium pyrophosphate, anhydrous Na4O7P2 265.9024 265.871004078 tetrasodium (phosphonatooxy)phosphonate tetrasodium diphosphate 7722-88-5 [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O InChI=1S/4Na.H4O7P2/c;;;;1-8(2,3)7-9(4,5)6/h;;;;(H2,1,2,3)(H2,4,5,6)/q4*+1;/p-4 FQENQNTWSFEDLI-UHFFFAOYSA-J belongs to the class of inorganic compounds known as alkali metal pyrophosphates. These are inorganic compounds in which the largest oxoanion is pyrophosphate, and in which the heaviest atom not in an oxoanion is an alkali metal. Alkali metal pyrophosphates Inorganic compounds Mixed metal/non-metal compounds Alkali metal oxoanionic compounds Alkali metal pyrophosphates Inorganic oxides Inorganic sodium salts Alkali metal pyrophosphate Inorganic oxide Inorganic salt Inorganic sodium salt inorganic sodium salt melting_point Mp 993° (985°) logp -1.4 ChemAxon pka_strongest_acidic 1.7 ChemAxon iupac tetrasodium (phosphonatooxy)phosphonate ChemAxon average_mass 265.9024 ChemAxon mono_mass 265.871004078 ChemAxon smiles [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O ChemAxon formula Na4O7P2 ChemAxon inchi InChI=1S/4Na.H4O7P2/c;;;;1-8(2,3)7-9(4,5)6/h;;;;(H2,1,2,3)(H2,4,5,6)/q4*+1;/p-4 ChemAxon inchikey FQENQNTWSFEDLI-UHFFFAOYSA-J ChemAxon polar_surface_area 135.61 ChemAxon refractivity 21.04 ChemAxon polarizability 9.03 ChemAxon rotatable_bond_count 2 ChemAxon acceptor_count 6 ChemAxon donor_count 0 ChemAxon physiological_charge -3 ChemAxon formal_charge 0 ChemAxon odorless