Eosin Y ∼99% (dye content), Sigma-Aldrich®

Supplier: SIGMA-ALDRICH MICROSCOPY
Warning

Synonyms: Acid Red 87, Tetrabromofluorescein, 2-(3,6-Dihydroxy-2,4,5,7-tetrabromoxanthen-9-yl)-benzoic acid, 2,4,5,7-Tetrabromofluorescein, Eosin yellowish, Solvent red 43, Bromofluorescein, Bromo acid J. TS, XL, or XX, CI 45380, Bronze Bromo ES, Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 2',4',5',7'-tetrabromo-3',6'-dihydroxy-

M-Clarity™ quality level = MQ200

E4009-25G E4009-5G
E4009-25GEA 428 GBP
E4009-25G E4009-5G
Eosin Y ∼99% (dye content), Sigma-Aldrich®
Eosin Y

Eosin Y is a xanthene dye and is used for the differential staining of connective tissue and cytoplasm. In histopathology, it is applied as a counterstain after hematoxylin and before methylene blue. It is also used as a background stain, thereby giving contrast to the nuclear stains.


  • Eosin Y has been used as a stain
  • To determine the location of the brain sections
  • For staining of fixed liver tissue
  • For histological examination of brain sections from the dorsal hippocampus

Formula: C₂₀H₈Br₄O₅
MW: 647,89 g/mol
Melting Pt: 295…296 °C
Storage Temperature: Room Temperature
MDL Number: MFCD00036189
CAS Number: 15086-94-9
EINECS: 241-409-6
Merck Index: 13,03634
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Specification Test Results

Appearance (Colour) Light Red to Red and Pink
Appearance (Form) Powder
Infrared spectrum Conforms to Structure
Solubility (Colour)
Orange
c = 1 mg/ml; Ethanol
Conforms
Solubility (Turbidity) Clear to Very Hazy
Carbon 33.4 - 40.8 %

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