Eosin Y (yellowish) 75% (by HPLC), Sigma-Aldrich®
Supplier: SIGMA-ALDRICH MICROSCOPYTotal Ratings: 0
Avg. Ratings: 0.0 out of 5
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Warning
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Synonyms:
Tetrabromofluorescein disodium salt
, Eosin Y disodium salt
, Eosin 225
, 2′,4′,5′,7′-Tetrabromofluorescein disodium salt
, Solvent Red 43
, Disodium 2-(2,4,5,7-tetrabromo-6-oxido-3-oxoxanthen-9-yl)benzoate
, Disodium 2',4',5',7'-tetrabromo-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-bis(olate)
, Field's Stain B
, 2,4,5,7-Tetrabromofluorescein disodium salt
M-Clarity™ quality level = MQ100
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 reagent in the preparation of Nigrosin-Eosin (NE) stain and is used in hematoxylin and eosin (H&E) staining technique to visualise alginate.
Formula:
C₂₀H₆Br₄Na₂O₅ MW: 691.86 g/mol Melting Pt: 295…296 °C Storage Temperature: Ambient |
MDL Number:
MFCD00005040 CAS Number: 17372-87-1 EINECS: 241-409-6 Merck Index: 13,03634 |
Specification Test Results
Appearance (Colour) | Orange to Very Dark Orange |
Appearance (Form) | Powder |
Infrared spectrum | Conforms to Structure |
Wavelength | 521 - 527 nm |
Extinction Coefficient | ≥90000 |
Wavelength | 304 - 310 nm |
Extinction Coefficient | ≥14000 |
Wavelength | 255 - 261 nm |
Extinction Coefficient In Methanol |
≥30000 |
Purity (HPLC) | ≥75.0% |
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