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Erythrosine B

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For Research Use Only | Not For Clinical Use
CATAPB16423680
CAS16423-68-0
Structure
SynonymsTetraiodofluorescein Sodium Salt; Aizen Erythrosine; Calcoid Erythrosine N
Molecular Weight879.9
Molecular FormulaC20H6I4Na2O5
DescriptionErythrosine B also commonly referred to as Erythrosine or Red No. 3 is an organoiodine chemical that is a fluorone derivative. It is the disodium salt of 2,4,5,7-tetraiodofluorescein. It occurs as powder or granules and is red to orange in color. Its maximum absorbance is at 530 nm. It is used as a stain of some cell types.
Melting Point142 to 144 °C
AppearanceOrange to red-orange powder
Color Index45430
Pubchem CID12961638
Pubchem SID462770364
UsesIn microscopy, erythrosine is often used as a counterstain for visualizing proteins, connective tissues, fibres and keratin in sample material of human origin.
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