1.0 2010-04-08 22:15:06 UTC 2025-11-19 02:32:34 UTC FDB020549 Disodium hydrogen citrate Preservative Disodium citrate, or disodium hydrogen citrate, is a sodium acid salt of citric acid (sodium citrate) with the chemical formula Na2HC6H5O7, or Na2H(C3H5O(COO)3). It is one of the 3 citric acid salts. It is used as an antioxidant in food as well as to improve the effects of other antioxidants. It is also used as an acidity regulator and sequestrant. Typical products include gelatin, jam, sweets, ice cream, carbonated beverages, milk powder, wine, and processed cheeses. 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, disodium salt Alkacitron Citralka Citric acid, disodium salt Disodium 2-hydroxy-1,2,3-propanetricarboxylate Disodium citrate Disodium hydrogen citrate Disodium monohydrogen citrate C6H8Na2O7 238.1031 238.00654196 disodium 2-hydroxypropane-1,2,3-tricarboxylic acid disodium citric acid 144-33-2 [Na+].[Na+].OC(=O)CC(O)(CC(O)=O)C(O)=O InChI=1S/C6H8O7.2Na/c7-3(8)1-6(13,5(11)12)2-4(9)10;;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);;/q;2*+1 CEYULKASIQJZGP-UHFFFAOYSA-N belongs to the class of organic compounds known as tricarboxylic acids and derivatives. These are carboxylic acids containing exactly three carboxyl groups. Tricarboxylic acids and derivatives Organic compounds Organic acids and derivatives Carboxylic acids and derivatives Tricarboxylic acids and derivatives Aliphatic acyclic compounds Alpha hydroxy acids and derivatives Carbonyl compounds Carboxylic acids Hydrocarbon derivatives Organic alkali metal salts Organic cations Organic oxides Tertiary alcohols Alcohol Aliphatic acyclic compound Alpha-hydroxy acid Carbonyl group Carboxylic acid Hydrocarbon derivative Hydroxy acid Organic alkali metal salt Organic cation Organic oxide Organic oxygen compound Organic salt Organooxygen compound Tertiary alcohol Tricarboxylic acid or derivatives melting_point Mp 149° dec. logp -1.3 ChemAxon pka_strongest_acidic 3.05 ChemAxon pka_strongest_basic -4.2 ChemAxon iupac disodium 2-hydroxypropane-1,2,3-tricarboxylic acid ChemAxon average_mass 238.1031 ChemAxon mono_mass 238.00654196 ChemAxon smiles [Na+].[Na+].OC(=O)CC(O)(CC(O)=O)C(O)=O ChemAxon formula C6H8Na2O7 ChemAxon inchi InChI=1S/C6H8O7.2Na/c7-3(8)1-6(13,5(11)12)2-4(9)10;;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);;/q;2*+1 ChemAxon inchikey CEYULKASIQJZGP-UHFFFAOYSA-N ChemAxon polar_surface_area 132.13 ChemAxon refractivity 35.62 ChemAxon polarizability 15.5 ChemAxon rotatable_bond_count 5 ChemAxon acceptor_count 7 ChemAxon donor_count 4 ChemAxon physiological_charge -3 ChemAxon formal_charge 2 ChemAxon