6-Carboxyfluorescein
Also known as: 3',6'-Dihydroxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthene]-6-carboxylic acid, 3',6'-dihydroxy-1-keto-spiro[isobenzofuran-3,9'-xanthene]-5-carboxylic acid, 3',6'-dihydroxy-1-oxo-spiro[2-benzofuran-3,9'-xanthene]-5-carboxylic acid, 3-Oxo-3',6'-dihydroxy-1,3-dihydrospiro[isobenzofuran-1,9'-[9H]xanthene]-6-carboxylic acid, 6-Carboxyfluorescein Hydrate, 6-FAM, 6-FAM FLUOS, 6-FAM Hydrate, 6-FAM, 6-CF, 6-carboxy-fluorescein, Carboxyfluorescein, Spiro[isobenzofuran-1(3H),9'-[9H]xanthene]-6-carboxylic acid, 3',6'-dihydroxy-3-oxo-, MFCD00036873
6-Carboxyfluorescein (CAS 3301-79-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C21H12O7 and a molecular weight of 376.316 g/mol. Key properties include a melting point of >300 °C(lit.), a boiling point of 736.4±60.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 271.0±26.4 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 3301-79-9
- Jingsj CID
- J-5376-9
- Molecular Formula
- C21H12O7
- Molecular Weight
- 376.316 g/mol
- Category
- Organic Compounds
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300 °C(lit.) |
|---|---|
| Boiling Point | 736.4±60.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 271.0±26.4 °C |
| Exact Mass | 376.058289 |
| PSA | 113.29000 |
| LogP | 2.66 |
| Vapor Pressure | 0.0±2.5 mmHg at 25°C |
| Refractive Index | 1.816 |
| Additional Property | DMSO: soluble |
Customs & Trade Information
| HS Code | 2915900090 |
|---|---|
| Summary | 2915900090 other saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) MFN tariff:5.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 6-Carboxyfluorescein?
The CAS number of 6-Carboxyfluorescein is 3301-79-9.
What are the molecular formula and molecular weight of 6-Carboxyfluorescein?
6-Carboxyfluorescein has molecular formula C21H12O7 and molecular weight 376.316 g/mol.
What are the upstream and downstream products of 6-Carboxyfluorescein?
For 6-Carboxyfluorescein, Upstream Products: Resorcinol, Trimellitic anhydride; Downstream Products: 6-Carboxyfluorescein succinimidyl ester.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "6-Carboxyfluorescein (CAS 3301-79-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-5376-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.