Erythrosine

Erythrosine
Names
	IUPAC name 2-(6-Hydroxy-2,4,5,7-tetraiodo-3-oxo-xanthen-9-yl)benzoic acid
Identifiers
CAS Number	16423-68-0 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL1332616 ;
ChemSpider	3144 ;
ECHA InfoCard	100.036.390
E number	E127 (colours)
PubChem CID	3259;
UNII	8TL7LH93FM ;
CompTox Dashboard (EPA)	DTXSID7044843 ;
	InChI 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 Key: OALHHIHQOFIMEF-UHFFFAOYSA-N ; InChI=1/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 Key: OALHHIHQOFIMEF-UHFFFAOYAB;
	SMILES [O-]C(=O)C1=CC=CC=C1C1=C2C=C(I)C(=O)C(I)=C2OC2=C1C=C(I)C([O-])=C2I.[Na].[Na];
Properties
Chemical formula	C20H6I4Na2O5
Molar mass	879.86 g/mol
Melting point	142 to 144 °C (288 to 291 °F; 415 to 417 K)
Hazards
NFPA 704 (fire diamond)	2 1 0
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Erythrosine, also known as Red No. 3, is an organoiodine compound, specifically a derivative of fluorone. It is a pink dye which is 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.

^ "Erythrosine B product description". The Chemical Book.
^ Lyday PA (2005). "Iodine and Iodine Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH.
^ Lancashire RJ. "Food Color Additives". Department of Chemistry, University of the West Indies. Archived from the original on 28 January 2007. Retrieved 29 January 2007.

[1] "Erythrosine B product description". The Chemical Book.

[Ullmann-2] Lyday PA (2005). "Iodine and Iodine Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH.

[3] Lancashire RJ. "Food Color Additives". Department of Chemistry, University of the West Indies. Archived from the original on 28 January 2007. Retrieved 29 January 2007.

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