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Congo red
(redirected from Congo red test)

    Also found in: Medical, Legal, Financial, Encyclopedia, Wikipedia, Hutchinson 0.06 sec.
Congo red
n.
A brownish-red powder, C32H22N6Na2O6S2, used in medicine and as a dye, indicator, and biological stain.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.congo red - a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)
solution - a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"
acid-base indicator - an indicator that changes color on going from acidic to basic solutions
azo dye - any dye containing one or more azo groups


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