Indicator, Reagent, or Diagnostic Aid
congo red Audio
Con·go red
Subclass of:
Naphthalenesulfonates
Definitions related to congo red:
  • An acid dye used in testing for hydrochloric acid in gastric contents. It is also used histologically to test for AMYLOIDOSIS.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • Dye and chemical solution stains for medical purposes are mixtures of synthetic or natural dyes or nondye chemicals in solutions used in staining cells and tissues for diagnostic histopathology, cytopathology, or hematology.
    Standard Product Nomenclature
    U.S Food & Drug Administration, 2003
  • The sodium salt of benzidinediazo-bis-1-naphthylamine-4-sulfonic acid; a diazo dye that is red in alkaline solution and blue in acid solution and used especially as an indicator and as a biological stain.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
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