Molekula
5(6)-Carboxyfluorescein
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
5(6)-Carboxyfluorescein is a fluorescent dye used in biochemical assays, including flow cytometry, fluorescence microscopy, and molecular biology applications. It is commonly employed as a label for proteins, nucleic acids, and cellular tracers due to its high quantum yield and photostability. Available in powder form with a molecular formula of C21H12O7, a molecular weight of 376.32 g/mol, and stored at ambient temperature. CAS number: 72088-94-9. Signal word: Warning. Molekula supplies 5(6)-Carboxyfluorescein from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
-
5 g — £124.40 per pack ex VAT · £149.28 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Orange coloured crystals |
| Melting Point | 275 Deg C |
| Storage Temperature | +20 ° C |
| Assay | 90% min |
| Shelf life | 5 years |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 20570220 |
| CAS Number | 72088-94-9 |
| IUPAC Name | 3',6'-dihydroxy-1-oxospiro[2-benzofuran-3,9'-xanthene]-5-carboxylic acid;3',6'-dihydroxy-3-oxospiro[2-benzofuran-1,9'-xanthene]-5-carboxylic acid |
| Molecular Formula | C21H12O7 |
| Molecular Weight | 376.32 |
| Exact Mass | 752.1166 |
| SMILES | C1=CC2=C(C=C1C(=O)O)C3(C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O)OC2=O.C1=CC2=C(C=C1C(=O)O)C(=O)OC23C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O |
| InChIKey | BPVHBBXCESDRKW-UHFFFAOYSA-N |
| InChI | InChI=1S/2C21H12O7/c22-11-2-5-15-17(8-11)27-18-9-12(23)3-6-16(18)21(15)14-4-1-10(19(24)25)7-13(14)20(26)28-21;22-11-2-5-14-17(8-11)27-18-9-12(23)3-6-15(18)21(14)16-7-10(19(24)25)1-4-13(16)20(26)28-21/h2*1-9,22-23H,(H,24,25) |
| PubChem CID | 44119975 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H319 Causes serious eye irritation
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-5(6)-carboxylic acid
- 5-(and-6)-carboxyfluorescein
- 5-(and-6)-FAM
- 5(6)-Carboxyfluorescein - mixture
- 5(6)-Carboxyfluorescein, mixture of isomers
- BPVHBBXCESDRKW-UHFFFAOYSA-N
Frequently asked questions
What is 5(6)-Carboxyfluorescein used for?
It is commonly used as a fluorescent dye in biological and biochemical applications, such as labeling biomolecules, tracking cellular processes, and flow cytometry.
What is the chemical formula and molecular weight of 5(6)-Carboxyfluorescein?
The formula is C21H12O7 with a molecular weight of 376.32 g/mol.
How should 5(6)-Carboxyfluorescein be stored?
It should be stored at ambient temperature, protected from light and moisture.
What grade is available for 5(6)-Carboxyfluorescein?
Available in high-purity grade suitable for research and diagnostic applications.
Can Molekula supply 5(6)-Carboxyfluorescein in bulk?
Yes, Molekula can supply 5(6)-Carboxyfluorescein in bulk quantities—please contact sales for details.
What documentation comes with an order of 5(6)-Carboxyfluorescein?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.