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Indigo carmine, or 5,5′-indigodisulfonic acid sodium salt, is an organic salt derived from indigo by aromatic sulfonation, which renders the compound soluble in water. It is approved for use as a food colorant in the United States and European Union to produce a blue color.
Indigo carmine is an organic sodium salt resulting from the formal condensation of indigo carmine (acid form) with two equivalents of sodium hydroxide. It is an indicator at pH 11.5-14, changing from blue to yellow. It has a role as a food colouring, a histological dye and a two-colour indicator.
20 Σεπ 2023 · Indigo carmine is used as a photometric detector, as a microscopic dye, and as a redox indicator in analytical chemistry [18,36,136]. Because indigo carmine exhibits antioxidant properties related to the ability to scavenge anionic superoxide or dioxygen, it is used for ozone detection.
Indigo carmine is a deep blue contrast dye that coats mucosal surfaces and persists for a few minutes, highlighting mucosal pits, grooves, and crevices, improving the visualization of mucosal structures and allowing for the delineation of any lesions or areas of inflammation.
23 Φεβ 2023 · Indigo carmine undergoes a reversible reduction. Shaking the flask brings more oxygen into the solution, provoking the formation of the oxidized (green) form. The indigo carmine will eventually undergo reduction again to its reduced (yellow) form.
1 Αυγ 2012 · Indigo carmine, the acid dye ‘Saxon Blue’, was invented by Johann Christian Barth in 1743. Indigo carmine is a water-soluble blue acid dye with the advantage of an easy dyeing process.
1 Ιουν 2016 · This monograph for Indigo Carmine provides, in addition to common physical constants, a general description including typical appearance, applications, and aqueous solubility.
