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Wiktionary
erythrosine

n. (context chemistry English) tetraiodo-fluorescein, a cherry-pink fluorone used as a food colouring, in printing inks, as a biological stain, a dental plaque disclosing agent and a radiopaque medium.

Wikipedia
Erythrosine

Erythrosine, also known as Red No. 3, is an organoiodine compound, specifically a derivative of fluorone. It is cherry-pink synthetic, primarily used for food coloring. It is the disodium salt of 2,4,5,7-tetraiodo fluorescein. Its maximum absorbance is at 530 nm in an aqueous solution, and it is subject to photodegradation.

Usage examples of "erythrosine".

O, Acid Magenta, Indigo Extract, Phloxine, Naphthol Yellow, Orange G G, Scarlet S, Azo Red A, Eosines, Thiocarmine R, Naphthol Black B B, New Victoria Black Blue, Erythrosine, and Roccelline.