CHEBI:90117 - indigo carmine (acid form)

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ChEBI Name indigo carmine (acid form)
ChEBI ID CHEBI:90117
Definition A member of the class of indolones obtained by formal 2,2'-oxidative coupling of two molecules of 3-oxo-2,3-dihydroindole-5-sulfonic acids.
Stars This entity has been manually annotated by the ChEBI Team.
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Formula C16H10N2O8S2
Net Charge 0
Average Mass 422.392
Monoisotopic Mass 421.98786
InChI InChI=1S/C16H10N2O8S2/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)/b14-13+
InChIKey CFZXDJWFRVEWSR-BUHFOSPRSA-N
SMILES C=1(C=CC2=C(C1)C(\C(=C\3/NC=4C=CC(=CC4C3=O)S(O)(=O)=O)\N2)=O)S(O)(=O)=O
Roles Classification
Biological Role(s): food colouring
A food additive that imparts colour to food. In European countries, E-numbers for permitted food colours are from E 100 to E 199, divided into yellows (E 100-109), oranges (E 110-119), reds (E 120-129), blues and violets (E 130-139), greens (E 140-149), browns and blacks (E 150-159), and others (E 160-199).
Application(s): food colouring
A food additive that imparts colour to food. In European countries, E-numbers for permitted food colours are from E 100 to E 199, divided into yellows (E 100-109), oranges (E 110-119), reds (E 120-129), blues and violets (E 130-139), greens (E 140-149), browns and blacks (E 150-159), and others (E 160-199).
histological dye
A dye used in microscopic or electron microscopic examination of cells and tissues to give contrast and to highlight particular features of interest, such as nuclei and cytoplasm.
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ChEBI Ontology
Outgoing indigo carmine (acid form) (CHEBI:90117) has role food colouring (CHEBI:77182)
indigo carmine (acid form) (CHEBI:90117) has role histological dye (CHEBI:77178)
indigo carmine (acid form) (CHEBI:90117) is a arenesulfonic acid (CHEBI:33555)
indigo carmine (acid form) (CHEBI:90117) is a enone (CHEBI:51689)
indigo carmine (acid form) (CHEBI:90117) is a indolones (CHEBI:24829)
indigo carmine (acid form) (CHEBI:90117) is a olefinic compound (CHEBI:78840)
indigo carmine (acid form) (CHEBI:90117) is a ring assembly (CHEBI:36820)
indigo carmine (acid form) (CHEBI:90117) is conjugate acid of indigo carmine(2−) (CHEBI:90120)
Incoming indigo carmine(2−) (CHEBI:90120) is conjugate base of indigo carmine (acid form) (CHEBI:90117)
IUPAC Name
(2E)-3-oxo-2-(3-oxo-5-sulfo-1,3-dihydro-2H-indol-2-ylidene)-2,3-dihydro-1H-indole-5-sulfonic acid
Synonyms Sources
2-(1,3-Dihydro-3-oxo-5-sulpho-2H-indol-2-ylidene)-3-oxoindoline-5-sulphonic acid ChemIDplus
indigo carmine free acid ChEBI
indigo-5,5'-disulfonic acid ChEBI
Indigotindisulfonate ChemIDplus
Indigotindisulfonic acid ChemIDplus
Manual Xrefs Databases
4575 DrugCentral
HMDB0059912 HMDB
Indigo_carmine Wikipedia
View more database links
Registry Numbers Types Sources
483-20-5 CAS Registry Number ChemIDplus
64330 Reaxys Registry Number Reaxys
Last Modified
22 February 2017