1.0 2010-04-08 22:11:23 UTC 2025-11-19 00:48:36 UTC FDB014651 Disodium pyrophosphate Employed in food processing as a preservative, emulsifying agent and leavening agent Disodium pyrophosphate or sodium acid pyrophosphate is a buffering and chelating agent, with many food and industrial uses. Diphosphoric acid disodium salt Diphosphoric acid, sodium salt (1:2) Disodium acid pyrophosphate Disodium dihydrogen diphosphate Disodium dihydrogen pyrophosphate Disodium diphosphate, 9CI E450a Pyrophosphoric acid, disodium salt Sodium acid pyrophosphate Sodium diphosphate dibasic Sodium pyrophosphate Sodium pyrophosphate dibasic H2Na2O7P2 221.9387 221.907114792 disodium hydrogen (hydrogen phosphonatooxy)phosphonate disodium diphosphate(2-) 7758-16-9 [Na+].[Na+].OP([O-])(=O)OP(O)([O-])=O InChI=1S/2Na.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-2 GYQBBRRVRKFJRG-UHFFFAOYSA-L 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 melting_point >600 °C logp -1.4 ChemAxon pka_strongest_acidic 1.7 ChemAxon iupac disodium hydrogen (hydrogen phosphonatooxy)phosphonate ChemAxon average_mass 221.9387 ChemAxon mono_mass 221.907114792 ChemAxon smiles [Na+].[Na+].OP([O-])(=O)OP(O)([O-])=O ChemAxon formula H2Na2O7P2 ChemAxon inchi InChI=1S/2Na.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-2 ChemAxon inchikey GYQBBRRVRKFJRG-UHFFFAOYSA-L ChemAxon polar_surface_area 129.95 ChemAxon refractivity 23.28 ChemAxon polarizability 9.68 ChemAxon rotatable_bond_count 2 ChemAxon acceptor_count 6 ChemAxon donor_count 2 ChemAxon physiological_charge -2 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 1316617 Specdb::MsMs 1316618 Specdb::MsMs 1316619 Specdb::MsMs 1431070 Specdb::MsMs 1431071 Specdb::MsMs 1431072