Chemicals and Drugs

Indigo Carmine

Indolesulfonic acid used as a dye in renal function testing for the detection of nitrates and chlorates, and in the testing of milk.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Indolesulfonic acid used as a dye in renal function testing for the detection of nitrates and chlorates, and in the testing of milk.

Chemical Identity

Chemical Information

Molecular Formula
C16H8N2Na2O8S2
Molecular Weight
466.4 g/mol
IUPAC Name
disodium;(2E)-3-oxo-2-(3-oxo-5-sulfonato-1H-indol-2-ylidene)-1H-indole-5-sulfonate
InChIKey
KHLVKKOJDHCJMG-QDBORUFSSA-L
SMILES
C1=CC2=C(C=C1S(=O)(=O)[O-])C(=O)/C(=C\3/C(=O)C4=C(N3)C=CC(=C4)S(=O)(=O)[O-])/N2.[Na+].[Na+]
MeSH Unique ID
D007203
Source
PubChem CID 5284351

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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Drug Class

Pharmacological Action

MeSH Record

Synonyms

14 entry terms
  • Indigotindisulfonate Sodium
  • Soluble Indigo Blue
  • Carmine, Indigo
  • Indigo Blue, Soluble
  • (delta-2,2'-biindole)-3,3'-dione
  • 2-(1,3-Dihydro-3-oxo-5-sulpho-2H-indol-2-ylidene)-3- oxoindoline-5-sulphonic acid
  • D&C Blue NO. 6
  • FD&C Blue No. 2
  • Indigo
  • Indigo Blue
  • Indigo Disulfonate
  • Indigotin
  • Indigotindisulfonate
  • Indigotindisulfonic Acid

MeSH Record

Aspects Covered

25 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, analysis, antagonists & inhibitors, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, economics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

History Note

2012 (1975)

MeSH Record

Previous Indexing

  • Indoles (1969-1974)
  • Sulfonic Acids (1969-1974)

MeSH Hierarchy

Tree Number

  1. D03w.633.100.473.396w

AMA Style

References

  1. National Library of Medicine. Indigo Carmine. Medical Subject Headings (MeSH). 2026. Unique ID D007203. http://id.nlm.nih.gov/mesh/2026/D007203
  2. Indigo Carmine. In: Wikipedia. https://en.wikipedia.org/wiki/Indigo_carmine
  3. Indigo Carmine. In: Wikidata. https://www.wikidata.org/wiki/Q410120
  4. Indigo Carmine. In: PubChem Compound. CID 5284351. https://pubchem.ncbi.nlm.nih.gov/compound/5284351