Description
Erythrosine, also known as Red No. 3, is an organoiodine compound, specifically a derivative of fluorone. It is cherry or melon-pink synthetic, primarily used for food coloring.[2] It is the disodium salt of 2,4,5,7-tetraiodofluorescein. Its maximum absorbance is at 530 nm[3] in an aqueous solution, and it is subject to photodegradation.
Uses
It is used as a:
food coloring[4]
printing ink[5]
biological stain[6]
dental plaque disclosing agent[7]
radiopaque medium[6]
sensitizer for orthochromatic photographic films
Erythrosine is commonly used in sweets such as some candies and popsicles, and even more widely used in cake-decorating gels. It is also used to color pistachio shells.[8][9] As a food additive, it has the E number E127.
Synonyms
Erythrosine B; Erythrosin B; Acid Red 51; C.I. 45430; FD & C Red No.3; E127; 2′,4′,5′,7′-Tetraiodo-3′,6′-dihydroxy-spiro[3H-isobenzofuran-1,9′-xanthen]-3-one disodium salt; Tetraiodofluorescein Sodium Salt; Calcoid Erythrosine N; 2,4,5,7-Tetraiodo-3,6-dihydroxyxanthene-9-spiro-1′-3H-isobenzofuran-3′-one disodium salt; 2′,4′,5′,7′-Tetraiodofluorescein, disodium salt; C.I.Food Red 14; Aizen Erythrosine; Tetraiodifluorescein, disodium salt; Spiro[isobenzofuran- 1(3H),9′-[9H]xanthen]-3-one, 3′,6′-dihydroxy-2′,4′,5′,7′-tetraiodo-, disodium salt.[16][17]
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