Eosin Y
Based on 3 publication(s) in Google Scholar
Eosin Y (Acid Red 87 free base) is a soluble acid red dye molecule. Eosin Y has a wide application in organic synthesis as a photoredox catalyst.
For research use only. We do not sell to patients.
- Purity: 99.42%
- CAS No.: 15086-94-9
- Formula: C20H8Br4O5
- Molecular Weight:647.89
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Storage:
4°C, protect from light, stored under nitrogen
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)
To place orders, for customer services and technical support, please contact: MedChemExpress USA
Tel: 609-228-6898 E-mail: [email protected] [email protected]
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
Publications Citing Use of MedChemExpress (MCE) Eosin Y
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Customer Validation & Images
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Histological Imaging/Staining
Biological Activity
Eosin Y is widely applied as a photoredox catalyst in organic synthesis[1].
Eosin Y finds application in cell staining, as a pH indicator, as an indicator in the analytical halide determination by Fajans and as a dye pigment, e.g. in lip sticks[1].
Eosin Y is the most widely used counterstain in routine staining of histological tissue sections (erythrocytes, collagen, epithelial cells, etc.)[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 15086-94-9
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Appearance Solid
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Molecular Weight 647.89
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Formula C20H8Br4O5
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Color Yellow to orange
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SMILES
O=C1OC2(C3=C(OC4=C2C=C(Br)C(O)=C4Br)C(Br)=C(O)C(Br)=C3)C5=C1C=CC=C5
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Synonyms
Acid Red 87 free base
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
4°C, protect from light, stored under nitrogen
* In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)
Publications (3)
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Journal Impact Factor
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Most Recent
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Anal Chem
Exposome-Scale Investigation of Cl-/Br-Containing Chemicals Using High-Resolution Mass Spectrometry, Multistage Machine Learning, and Cloud Computing. [Abstract]2025 Jun 3;97(21):11099-11109. PMID: 40401576 -
Sci Rep
Circ_0008043 promotes the metastasis of hepatocellular carcinoma by regulating the miR-661/PLEKHG4B axis. [Abstract]2025 Jul 8;15(1):24580. PMID: 40628993
Eosin Y purchased from MedChemExpress. Usage Cited in: Sci Rep. 2025 Jul 8;15(1):24580. [Abstract]
Represent images of H&E staining results of pulmonary metastatic focis. The sections were counterstained with Eosin Y for 3 min to visualize cytoplasmic structures. H&E staining showed fewer pulmonary metastatic lesions following circ_0008043 knockdown in HCC.
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Int J Chron Obstruct Pulmon Dis
Network Pharmacology Followed by Experimental Validation to Explore the Mechanism of Stigmasterol in Sangbaipi Decoction Regulating PI3K/Akt Signaling to Alleviate Acute Exacerbation of Chronic Obstructive Pulmonary Disease. [Abstract]2024 Aug 8:19:1819-1834. PMID: 39140079
Solvent & Solubility
DMSO : 116.67 mg/mL (180.08 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Purity & Documentation
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Data Sheet (280 KB)
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SDS (396 KB)
- English - EN (396 KB)
- Français - FR (396 KB)
- Deutsch - DE (396 KB)
- Norwegian - NO (396 KB)
- Español - ES (396 KB)
- Swedish - SV (396 KB)
- Italian - IT (396 KB)
- Korean - KR (396 KB)
- Portuguese - PT (396 KB)
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Handling Instructions (2659 KB)
References
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 1.5435 mL | 7.7174 mL | 15.4347 mL | 38.5868 mL |
| 5 mM | 0.3087 mL | 1.5435 mL | 3.0869 mL | 7.7174 mL | |
| 10 mM | 0.1543 mL | 0.7717 mL | 1.5435 mL | 3.8587 mL | |
| 15 mM | 0.1029 mL | 0.5145 mL | 1.0290 mL | 2.5725 mL | |
| 20 mM | 0.0772 mL | 0.3859 mL | 0.7717 mL | 1.9293 mL | |
| 25 mM | 0.0617 mL | 0.3087 mL | 0.6174 mL | 1.5435 mL | |
| 30 mM | 0.0514 mL | 0.2572 mL | 0.5145 mL | 1.2862 mL | |
| 40 mM | 0.0386 mL | 0.1929 mL | 0.3859 mL | 0.9647 mL | |
| 50 mM | 0.0309 mL | 0.1543 mL | 0.3087 mL | 0.7717 mL | |
| 60 mM | 0.0257 mL | 0.1286 mL | 0.2572 mL | 0.6431 mL | |
| 80 mM | 0.0193 mL | 0.0965 mL | 0.1929 mL | 0.4823 mL | |
| 100 mM | 0.0154 mL | 0.0772 mL | 0.1543 mL | 0.3859 mL |
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