Fluorescein sodium
Also known as: Acid Yellow 73, Uranine, Uranin, Fluorescein Disodium Salt, Fluorescein Sodium Salt, Disodium 3-oxo-3H-spiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate, Sodium 3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-bis(olate), C.I. 45350, C.I. Acid Yellow 73, D and C yellow dye No 8, Yellow No. 8, Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 3',6'-dihydroxy-, disodium salt
Fluorescein sodium (CAS 518-47-8) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C20H10Na2O5 and a molecular weight of 376.270 g/mol. Key properties include a melting point of 320 °C, a boiling point of 620.8ºC at 760 mmHg, a density of 1.601 g/cm3 (20ºC) and a flash point of 232.6ºC. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 518-47-8
- Jingsj CID
- J-38281-0
- Molecular Formula
- C20H10Na2O5
- Molecular Weight
- 376.270 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Melting Point | 320 °C |
|---|---|
| Boiling Point | 620.8ºC at 760 mmHg |
| Density | 1.601 g/cm3 (20ºC) |
| Flash Point | 232.6ºC |
| Exact Mass | 376.032349 |
| PSA | 81.65000 |
| LogP | 4.54220 |
| Additional Property | 500 g/L (20 ºC) |
Activity & Biological Data
| Additional Information | [1]. Hirabayashi K, et al. Analysis of chemical equilibrium of silicon-substituted fluorescein and its application to develop a scaffold for red fluorescent probes. Anal Chem. 2015;87(17):9061-9069. [2]. Negm NA, et al. Fluorescein dye derivatives and their nanohybrids: Synthesis, characterization and antimicrobial activity. J Photochem Photobiol B. 2016;162:421-433. |
|---|
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Fluorescein sodium?
The CAS number of Fluorescein sodium is 518-47-8.
What are the molecular formula and molecular weight of Fluorescein sodium?
Fluorescein sodium has molecular formula C20H10Na2O5 and molecular weight 376.270 g/mol.
Which suppliers offer Fluorescein sodium?
1 supplier(s) listed; request a quote for pricing.
What are the upstream and downstream products of Fluorescein sodium?
For Fluorescein sodium, Downstream Products: Eosin Y (alcohol soluble).
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Fluorescein sodium (CAS 518-47-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38281-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.