Eosin Y
Eosin Y (CAS: 17372-87-1, C20H6Br4Na2O5, MW: 691.85) is a certified biological stain and a vibrant fluorescent dye. It is widely recognised for its utility as a histological stain, particularly in microscopy for staining cytoplasm and collagen. This disodium salt of tetrabromofluorescein also finds application as a fluorescent probe and label in various biological and molecular biology research settings. Its distinctive spectral properties make it valuable for imaging and detection.
- IUPAC
- 2′,4′,5′,7′-Tetrabromofluorescein disodium salt,Acid Red 87,Bromo acid J. TS, XL, or XX,Bromofluorescein,Bronze Bromo ES,D&C;Red No. 22,Eosin yellowish
- Synonyms
- 2′,4′,5′,7′-Tetrabromofluorescein disodium saltAcid Red 87Bromo acid J. TS, XL, or XXBromofluoresceinBronze Bromo ESD&C Red No. 22Eosin yellowish
Histological Staining
Eosin Y is a cornerstone stain in histology, effectively colouring cellular cytoplasm, connective tissues like collagen, and proteins a vivid pink or red. It is commonly used in combination with haematoxylin for routine microscopic examination of tissue sections.
Fluorescent Labeling
As a fluorescent dye, Eosin Y serves as a useful label in biological research. Its fluorescence properties can be exploited in various assays and imaging techniques, aiding in the detection and visualisation of specific cellular components or processes.
Molecular Biology Research
This compound is employed in molecular biology studies, particularly in areas investigating protein arginine methyltransferase (PRMT) modulation and histone methylation. Its role as a modulator in epigenetic research highlights its broader scientific utility.
Biochemical Assays
Eosin Y's distinct spectral characteristics make it suitable for use in certain biochemical assays. It can be employed as a probe or indicator in solution-based studies, contributing to the understanding of molecular interactions.
| Molecular weight | 691.85 |
|---|---|
| Empirical formula | C20H6Br4Na2O5 |
| Grade | certified by the Biological Stain Commission |
| Density | 1.015 g/mL at 25 °C |
| Solubility | H2O: soluble0.1 g/mL, dark red |
| Concentration | 5 wt. % in H2O |
| Suitability | in accordance for electrophoresis test |
| Composition | Dye content, 90% |
Hazard statements
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Colour Index Number | 45380 |
|---|---|
| Absorption | λmax 518 nm |
| Fluorescence | λex 532 nmλem 540 nm in H2O |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Eosin Y used for?
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Eosin Y is primarily used as a histological stain for cytoplasm and connective tissues in microscopy, and as a fluorescent label and probe in various biological and molecular biology research applications, including studies on epigenetic modulators.
What is the CAS number and formula for Eosin Y?
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The CAS number for Eosin Y is 17372-87-1, and its empirical formula is C20H6Br4Na2O5.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Eosin Y certified by the Biological Stain Commission with a dye content of 90%. We do not represent this product as USP, BP, or EP grade.
How should Eosin Y be handled safely?
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Eosin Y is classified as a warning substance that causes serious eye irritation (H319). When handling, use a dust mask type N95 (US), wear eyeshields and gloves. In case of contact with eyes, rinse cautiously with water for several minutes, removing contact lenses if present and easy to do, and continue rinsing (P305 + P351 + P338).
How is Eosin Y packed, shipped, and exported?
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Eosin Y is carefully packed to ensure safe transit and is available for global export by Tech Serve Solutions, adhering to all relevant shipping regulations for chemical compounds.
How can I request a sample or quote for Eosin Y?
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To request a sample or a quote for Eosin Y, please use the contact form on our website or reach out to our customer service team with your specific requirements.
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