Indigo carmine
disodium;2-(3-hydroxy-5-sulfonato-1H-indol-2-yl)-3-oxoindole-5-sulfonate
Molecular Identity
Indigo carmine
disodium;2-(3-hydroxy-5-sulfonato-1H-indol-2-yl)-3-oxoindole-5-sulfonate
PubChem CID: 2723854
Indigo carmine is an organic sodium salt resulting from the formal condensation of indigo carmine (acid form) with two equivalents of sodium hydroxide. It is an indicator at pH 11.5-14, changing from blue to yellow. It has a role as a two-colour indicator, a histological dye and a food colouring. It contains an indigo carmine(2-).
2D Structure
Properties
C16H8N2Na2O8S2
Molecular Formula
466.40
Molecular Weight
g/mol
465.9517
Exact Mass
Da
197
TPSA
May have limited oral absorption
2
H-Bond Donors
9
H-Bond Acceptors
877
Complexity
SMILES
Canonical SMILES
SMILES: Synonyms(20)
Indigo carmine860-22-0Acid Blue 74Indigotindisulfonate sodiumIndigotineindigocarmineC.I. ACID BLUE 74Sodium 3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonateIndigocarminC.I. Food Blue 1FD&C Blue No. 2Food Blue No. 2FD & C blue no. 2FD and C Blue No. 2Sachsischblau
Data from PubChem (NCBI)
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