Eosin B
曙红B
Also known as: Eosine I Bluish, Eosin bluish, Acid Red 91, C.I. Acid Red 91, 4',5'-Dibromo-2',7'-dinitrofluorescein disodium salt, 4',5'-Dibromo-3',6'-dihydroxy-2',7'-dinitrospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one disodium salt, Disodium 2-(4,5-dibromo-2,7-dinitro-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate, Eosin scarlet, Saffrosine, Caesar Red, Imperial Red, Safrosin, C.I. 45400
Eosin B (CAS 548-24-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C20H6Br2N2Na2O9 and a molecular weight of 624.057 g/mol. It is also known as Eosine I Bluish, Eosin bluish and Acid Red 91. Key properties include a melting point of 275ºC (dec.)(lit.), a boiling point of 694.1ºC at 760 mmHg and a flash point of 373.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 548-24-3
- Jingsj CID
- J-1311431-4
- Molecular Formula
- C20H6Br2N2Na2O9
- Chinese Name
- 曙红B
- Molecular Weight
- 624.057 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 275ºC (dec.)(lit.) |
|---|---|
| Boiling Point | 694.1ºC at 760 mmHg |
| Flash Point | 373.6ºC |
Frequently Asked Questions
What is the CAS number of Eosin B?
The CAS number of Eosin B is 548-24-3.
What are the molecular formula and molecular weight of Eosin B?
Eosin B has molecular formula C20H6Br2N2Na2O9 and molecular weight 624.057 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Eosin B (CAS 548-24-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1311431-4 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.