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Congo red
Congo redn. A brownish-red powder, C32H22N6Na2O6S2, used in medicine and as a dye, indicator, and biological stain.Congo red n (Elements & Compounds) a brownish-red soluble powder, used as a dye, a diagnostic indicator, a biological stain, and a chemical indicator. Formula: C32H22N6O6S2Na2 Con′go red′
n. a water-soluble powder, C32H22O6N6S2Na2, used chiefly as a dye, biological stain, and chemical indicator. [1880–85] Thesaurus| Noun | 1. | 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 solutionsazo dye - any dye containing one or more azo groups |
congo red
congo red[′käŋ·gō ′red] (organic chemistry) C32H22N6Na2O6S2 An azo dye, sodium diphenyldiazo-bis-α-naphthylamine sulfonate, used as a biological stain and as an acid-base indicator; it is red in alkaline solution and blue in acid solution. Congo red
Con·go red (kong'gō red), [C.I. 22120] An acid direct cotton dye, it is absorbed by amyloid and induces green fluorescence to amyloid in polarized light; used as a laboratory aid in the diagnosis of amyloidosis, as a histologic stain, and as an indicator (pH 3, blue-violet, to pH 5, red) in testing for free hydrochloric acid in gastric contents. See: Bennhold Congo red stain. Congo redn. A brownish-red powder, C32H22N6Na2O6S2, used in medicine and as a dye, indicator, and biological stain.Con·go red (kong'gō red) [CI 22120] An acid direct cotton dye, used as an indicator (pH 3.0, blue-violet, to pH 5.0, red) in testing for free hydrochloric acid in gastric contents; the dye is absorbed by amyloid and induces green fluorescence to amyloid in polarized light; used as a laboratory aid in the diagnosis of amyloidosis and as a histologic stain. FinancialSeeredcongo red
Words related to congo rednoun a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)Related Words- solution
- acid-base indicator
- azo dye
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