CAS No.: 17372-87-1
Synonyms: 2′,4′,5′,7′-Tetrabromofluorescein; Bromo acid J. TS, XL, or XX; Bromofluorescein; Bronze Bromo ES; Eosin yellowish; Solvent red 43; D&C Red No. 22; Bromoeosine; Bromofluoresceic acid.
| Physical Properties | |
| Chemical formula | C20H6Br4Na2O5 |
| IUPAC Name | disodium;2′,4′,5′,7′-tetrabromo-3-oxospiro[2-benzofuran-1,9′-xanthene]-3′,6′-diolate |
| Molecular weight | 691.9 g/mol |
| Solubility | Water & Ethanol |
| Density |  1.4 g/cm³ |
| Chemical Properties | |
| Colour | Reddish-yellow |
| State | Crystalline powder |
| Melting point | 295.5°C |
| λmax | 515-520 nm |
| Pictograms : |
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| Hazard Statements : | H317: May cause an allergic skin reaction |
| Precautionary statements : | P280: Wear protective gloves/eye protection P302+P352: IF ON SKIN: Wash with plenty of water P333+P313: If skin irritation or rash occurs: Get medical advice/attention |
CAS No.: 17372-87-1
Synonyms: 2′,4′,5′,7′-Tetrabromofluorescein; Bromo acid J. TS, XL, or XX; Bromofluorescein; Bronze Bromo ES; Eosin yellowish; Solvent red 43; D&C Red No. 22; Bromoeosine; Bromofluoresceic acid.
| Physical Properties | |
| Chemical formula | C20H6Br4Na2O5 |
| IUPAC Name | disodium;2′,4′,5′,7′-tetrabromo-3-oxospiro[2-benzofuran-1,9′-xanthene]-3′,6′-diolate |
| Molecular weight | 691.9 g/mol |
| Solubility | Water & Ethanol |
| Density |  1.4 g/cm³ |
| Chemical Properties | |
| Colour | Reddish-yellow |
| State | Crystalline powder |
| Melting point | 295.5°C |
| λmax | 515-520 nm |
| Pictograms : |
|
| Hazard Statements : | H317: May cause an allergic skin reaction |
| Precautionary statements : | P280: Wear protective gloves/eye protection P302+P352: IF ON SKIN: Wash with plenty of water P333+P313: If skin irritation or rash occurs: Get medical advice/attention |
Eosin Y is used primarily in histology for staining tissue samples, including in the H&E (Hematoxylin and Eosin) stain and Pap stain.
Eosin Y is typically effective in a pH range of 4.0 to 5.0.
Eosin Y is used as an indicator in acid-base titrations, particularly in the titration of strong acids with strong bases. It changes color in response to pH changes, helping to determine the endpoint of the titration.
Eosin Y is acidic. It typically functions as an acidic dye in staining applications.
Yes, Eosin Y stains dead cells. It binds to the proteins in dead cells, giving them a pink to red color, which helps to distinguish them from live cells during microscopy.
