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Eosine Yellow, Spirit Soluble

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For Research Use Only | Not For Clinical Use
CATAPB17372871
CAS17372-87-1
Structure
Synonyms2',4',5',7'-Tetrabromofluorescein disodium salt; Acid Red 87, Bronze Bromo ES
Molecular Weight691.88
Molecular FormulaC20H6Br4Na2O5
DescriptionEosin is a fluorescent acidic / negative compound that binds to and forms salts with basic, or eosinophilic, compounds containing positive charges (such as proteins that are basic / positive due to the presence of amino acid residues such as arginine and lysine) and stains them dark red or pink as a result of the actions of bromine on fluorescein.
AppearanceSolid
Color Index45386
GradeFor microscopy
UsesUsed as a counterstain to hematoxylin in H&E (haematoxylin and eosin) staining. H&E staining is one of the most commonly used techniques in histology. Tissue stained with haematoxylin and eosin shows cytoplasm stained pink-orange and nuclei stained darkly, either blue or purple. Eosin also stains red blood cells intensely red.
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