Congo red - Wikipedia
WEBCongo red is an organic compound, the sodium salt of 3,3′- ( [1,1′-biphenyl]-4,4′-diyl)bis (4-aminonaphthalene-1-sulfonic acid). It is an azo dye. Congo red is water-soluble, yielding a red colloidal solution; its solubility is greater in organic solvents.
Congo Red - an overview | ScienceDirect Topics
WEBCongo red is a reactive agent that changes color from red to dark blue in acidic environments where the pH is less than 3. Acid producing mucosa turns blue within a few minutes, whereas non–acid-producing mucosa remains red.
Congo red | Synthetic Dye, Azo Compound, Textile Dye | Britannica
WEBCongo 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 the colour to cotton fibres). Introduced in 1884, Congo red belongs to a …
Congo Red and amyloids: history and relationship - PMC
WEBJan 1, 2019 — Staining with Congo Red (CR) is a qualitative method used for the identification of amyloids in vitro and in tissue sections. However, the drawbacks and artefacts obtained when using this dye can be found both in vitro and in vivo.
Congo red | C32H22N6Na2O6S2 | CID 11313 - PubChem
WEBCongo Red is 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.
Congo Red - an overview | ScienceDirect Topics
WEBCongo Red is a linear molecule used in chemistry that binds to triple-helix polysaccharides, commonly identified by its characteristic yellow-green birefringence under polarized light. AI generated definition based on: Carbohydrate Polymers, 2021
What is Congo Red? - HistologyOutlines.com
WEBJul 16, 2023 — The biochemical properties that lead to positive staining in Congo Red are poorly understood. It is thought that a properly made, appropriately linear molecule of Congo Red has affinity for the beta pleated sheets that are the common make up …
Congo red - American Chemical Society
WEBSep 8, 2014 — “Congo red” is not the name of a famous African explorer, but a dye that dates to 1883. It was synthesized by P. Böttiger as a textile dye, but it subsequently became more important as a pH indicator. It colors aqueous solutions blue below pH 3.0 and becomes red above pH 5.0.
Congo red | C32H22N6Na2O6S2 - ChemSpider
WEBChemSpider record containing structure, synonyms, properties, vendors and database links for Congo red, 573-58-0.
Congo Red Stain | SpringerLink
WEBJan 9, 2022 — Congo red stain is the gold standard for the demonstration of amyloid in tissue sections. It is used to evaluate the presence and extent of amyloid deposits in different organs.
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