1.0 2010-04-08 22:08:58 UTC 2025-11-18 23:18:35 UTC FDB010117 Potassium acid pyrophosphate It is used as a food additive . Diphosphoric acid, dipotassium salt Dipotassium dihydrogen pyrophosphate Dipotassium dihydrogenpyrophosphate Dipotassium diphosphate Dipotassium pyrophosphate Pyrophosphoric acid, dipotassium salt H2K2O7P2 254.1558 253.854989164 dipotassium hydrogen (hydrogen phosphonatooxy)phosphonate dipotassium diphosphate(2-) 14691-84-0 [K+].[K+].OP([O-])(=O)OP(O)([O-])=O InChI=1S/2K.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-2 CQAIPTBBCVQRMD-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 salts Alkali metal pyrophosphate Inorganic oxide Inorganic salt logp -1.4 ChemAxon pka_strongest_acidic 1.7 ChemAxon iupac dipotassium hydrogen (hydrogen phosphonatooxy)phosphonate ChemAxon average_mass 254.1558 ChemAxon mono_mass 253.854989164 ChemAxon smiles [K+].[K+].OP([O-])(=O)OP(O)([O-])=O ChemAxon formula H2K2O7P2 ChemAxon inchi InChI=1S/2K.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 CQAIPTBBCVQRMD-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 1272502 Specdb::MsMs 1272503 Specdb::MsMs 1272504 Specdb::MsMs 1387501 Specdb::MsMs 1387502 Specdb::MsMs 1387503