Congo red is the sodium salt of 3,3`-([1,1`-biphenyl]-4,4`-diyl)bis(4-aminonaphthalene-1-sulfonic acid)(formula: C32H22N6Na2O6S2; molecular weight: 696.66 g/mol). It is a secondary diazo dye. Congo red is water soluble, yielding a red colloidal solution; its solubility is better in organic solvents such as ethanol. It has a strong, though appar......
Found on
http://en.wikipedia.org/wiki/Congo_red
• An artificial red dye from which the Congo group received its name. It is also widely used either in aqueous solution or as test paper (Congo paper) for the detection of free acid, which turns it blue.
Found on
http://thinkexist.com/dictionary/meaning/congo_red/
first of the synthetic dyestuffs of the direct type, that is, not requiring application of a mordant (a substance such as tannin or alum used to fix ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/c/128
<chemical> An odourless, dark red or reddish brown powder which decomposes on exposure to acid fumes. It is used as a diagnostic aid in amyloidosis, and has been used as an antihemolytic and detoxicant. ... Pharmacological action: dyes. ... Chemical name: 1-Naphthalenesulfonic acid, 3,3'-((1,1'-biphenyl)-4,4'-diylbis(azo))bis(4-amino-, disodi...
Found on
http://www.encyclo.co.uk/local/20973
A specific dye that is used to stain amyloid but has also been found to inhibit the build up of PrP in infected tissue in culture.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Naphthalene dye that is pH sensitive (blue-violet at pH 3, red at pH 5). Used as vital stain, also in staining for amyloid.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Congo red (Chemistry) An artificial red dye from which the Congo group received its name. It is also widely used either in aqueous solution or as test paper (
Congo paper ) for the detection of free acid, which turns it blue.
Found on
http://www.encyclo.co.uk/webster/C/136
Type: Term Pronunciation: kong′gō red Definitions: 1. 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 ac...
Found on
http://www.medilexicon.com/medicaldictionary.php?t=19819
Congo Red is a dye belonging to the azo-dyes. It is manufactured from benzedrine and napthionic acid, and can be used directly on cotton without employing a mordant.
Found on
http://www.probertencyclopaedia.com/browse/GC.HTM
[
n] - a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)
Found on
http://www.webdictionary.co.uk/definition.php?query=congo%20red
noun a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)
Found on
https://www.encyclo.co.uk/local/20974
a water-soluble powder, CHONSNa, one of the Congo colors that is not acid-fast or lightfast: used chiefly as a dye, biological stain, and chemical indicator.
Found on
https://www.infoplease.com/dictionary/congo-red
No exact match found.
