Share this entry
Congo red Line breaks: Congo red

Definition of Congo red in English:


[mass noun]
A red-brown azo dye which becomes blue in acidic conditions, used as a chemical indicator and as a stain in histology.
Example sentences
  • The chemicals used in making Congo red and the other aniline dyes were primarily derived from the coal-tar waste products of the coal gas and steel industries in Germany's Ruhr Valley.
  • The presence of amyloid confirmed histologically by either Congo red or sulfonated Alcian blue stains or by electron microscopy was seen in 8 muscles.
  • Potassium permanganate incubation caused loss of reactivity with Congo red.
Definition of Congo red in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources