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Erythrosine

Catalog Number DYE-AFC-0004
CAS Number 16423-68-0
Structure
Description Erythrosine is an organic iodine compound. It is a pink dye used primarily as a food coloring. In aqueous solution, its maximum absorbance is 530nm and it is susceptible to photodegradation.
Synonyms Red NO.3
IUPAC Name 2-(6-Hydroxy-2,4,5,7-tetraiodo-3-oxo-xanthen-9-yl)benzoic acid
Molecular Weight 879.86
Molecular Formula C20H6I4Na2O5
Canonical SMILES [O-]C(=O)C1=CC=CC=C1C1=C2C=C(I)C(=O)C(I)=C2OC2=C1C=C(I)C([O-])=C2I.[Na].[Na]
InChI 1S/C20H8I4O5/c21-11-5-9-17(13(23)15(11)25)28-18-10(6-12(22)16(26)14(18)24)20(9)8-4-2-1-3-7(8)19(27)29-20/h1-6,25-26H
InChI Key OALHHIHQOFIMEF-UHFFFAOYSA-N
Application Erythrosine is commonly used in some candies and sweets such as popsicles, and even more widely in cake decorating gels. It is also used to color pistachio shells.
CI Number C.I. 45430
E Number E127

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