Product overview

Name Eosin Y
Biological description

Eosin Y is a xanthene dye which stains the cytoplasm and connective tissue. It is suitable for counterstaining tissue after nuclear staining. It is a component of the H&E stain (Hematoxylin and eosin stain) which is one of the most commonly utilised histological tissue stains.

Purity >90%
Description Counterstain used in the H&E stain
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Solubility & Handling

Storage instructions +4°C
Solubility overview

Soluble in water (100 mM)

Important This product is for RESEARCH USE ONLY and is not intended for therapeutic or diagnostic use. Not for human or veterinary use.



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Chemical Data

Purity >90%
Chemical name 2′,4′,5′,7′-Tetrabromofluorescein
Molecular Weight 691.85
Chemical structure Eosin Y  [17372-87-1] Chemical Structure
Molecular Formula C20H6Br4O5.2Na
CAS Number 17372-87-1
PubChem identifier 11048
SMILES C1=CC=C(C(=C1)C2=C3C=C(C(=O)C(=C3OC4=C(C(=C(C=C24)Br)[O-])Br)Br)Br)C(=O)[O-].[Na+].[Na+]
MDL number MFCD00005040
Appearance Red solid

References for Eosin Y

References are publications that support the biological activity of the product
  • Synthetic applications of eosin Y in photoredox catalysis.

    Hari DP et al (2014) Chem Commun (Camb) 50(51) : 6688-99.
  • The role of energy transfer in bioluminescence quenching by xanthene dyes.

    Gerasimova MA et al (2009) J Photochem Photobiol B 97(3) : 117-22.
  • Eosin Y-sensitized artificial photosynthesis by highly efficient visible-light-driven regeneration of nicotinamide cofactor.

    Lee SH et al (2009) Chembiochem 10(10) : 1621-4.

3 Item(s)