1.0 2010-04-08 22:09:29 UTC 2025-11-18 23:24:52 UTC FDB011141 Indigotin disulfonate sodium Colour additive for food Amacid brilliant blue C.I. 73015 C.I. Acid blue 74 C.I. Food blue 1 Carmine blue E132 FD and C Blue No. 2 Indigo carmine Indigotin disulfonate sodium, USAN Indigotin? Soluble indigo blue C16H10N2Na2O8S2 468.369 467.967396036 disodium 3-oxo-2-[(2E)-3-oxo-5-sulfo-2,3-dihydro-1H-indol-2-ylidene]-2,3-dihydro-1H-indole-5-sulfonic acid disodium 3-oxo-2-[(2E)-3-oxo-5-sulfo-1H-indol-2-ylidene]-1H-indole-5-sulfonic acid 860-22-0 [Na+].[Na+].OS(=O)(=O)C1=CC2=C(N\C(C2=O)=C2\NC3=C(C=C(C=C3)S(O)(=O)=O)C2=O)C=C1 InChI=1S/C16H10N2O8S2.2Na/c19-15-9-5-7(27(21,22)23)1-3-11(9)17-13(15)14-16(20)10-6-8(28(24,25)26)2-4-12(10)18-14;;/h1-6,17-18H,(H,21,22,23)(H,24,25,26);;/q;2*+1/b14-13+;; KHLVKKOJDHCJMG-QDBORUFSSA-N belongs to the class of organic compounds known as indolines. Indolines are compounds containing an indole moiety, which consists of pyrrolidine ring fused to benzene to form 2,3-dihydroindole. Indolines Organic compounds Organoheterocyclic compounds Indoles and derivatives Indolines Aromatic heteropolycyclic compounds 1-sulfo,2-unsubstituted aromatic compounds Aryl ketones Azacyclic compounds Benzenoids Enamines Hydrocarbon derivatives Organic alkali metal salts Organic cations Organic oxides Organopnictogen compounds Organosulfonic acids Secondary alkylarylamines Sulfonyls Vinylogous amides 1-sulfo,2-unsubstituted aromatic compound Amine Aromatic heteropolycyclic compound Aryl ketone Arylsulfonic acid or derivatives Azacycle Benzenoid Dihydroindole Enamine Hydrocarbon derivative Ketone Organic alkali metal salt Organic cation Organic nitrogen compound Organic oxide Organic oxygen compound Organic salt Organic sulfonic acid or derivatives Organonitrogen compound Organooxygen compound Organopnictogen compound Organosulfonic acid Organosulfonic acid or derivatives Organosulfur compound Secondary aliphatic/aromatic amine Secondary amine Sulfonyl Vinylogous amide logp 1.01 ChemAxon pka_strongest_acidic -2.8 ChemAxon pka_strongest_basic -7.7 ChemAxon iupac disodium 3-oxo-2-[(2E)-3-oxo-5-sulfo-2,3-dihydro-1H-indol-2-ylidene]-2,3-dihydro-1H-indole-5-sulfonic acid ChemAxon average_mass 468.369 ChemAxon mono_mass 467.967396036 ChemAxon smiles [Na+].[Na+].OS(=O)(=O)C1=CC2=C(N\C(C2=O)=C2\NC3=C(C=C(C=C3)S(O)(=O)=O)C2=O)C=C1 ChemAxon formula C16H10N2Na2O8S2 ChemAxon inchi InChI=1S/C16H10N2O8S2.2Na/c19-15-9-5-7(27(21,22)23)1-3-11(9)17-13(15)14-16(20)10-6-8(28(24,25)26)2-4-12(10)18-14;;/h1-6,17-18H,(H,21,22,23)(H,24,25,26);;/q;2*+1/b14-13+;; ChemAxon inchikey KHLVKKOJDHCJMG-QDBORUFSSA-N ChemAxon polar_surface_area 166.94 ChemAxon refractivity 101.29 ChemAxon polarizability 39.7 ChemAxon rotatable_bond_count 2 ChemAxon acceptor_count 10 ChemAxon donor_count 4 ChemAxon physiological_charge -2 ChemAxon formal_charge 2 ChemAxon