For research use only. Not for therapeutic Use.
5(6)-Carboxyfluorescein is a mixture of 5-carboxy and 6-carboxy derivatives of fluorescein. It is commonly used to label biomolecules through a reaction involving the carboxyl group. Unlike its succinimidyl ester derivative CFSE (Item No. <span class=/itemid/>14456</span>), 5(6)-carboxyfluorescein is membrane impermeant. As a result, it can be used in studies of membrane permeability. 5(6)-Carboxyfluorescein displays excellent fluorescence (excitation/emission at 492/514 nm, respectively), and its excitation maximum closely matches the 488 nm spectral line of argon-ion lasers.
| Catalog Number | R001776 |
| CAS Number | 72088-94-9 |
| Synonyms | 3’,6’-Dihydroxy-3-oxo-spiro[isobenzofuran-1(3H),9’-[9H]xanthene]-ar-carboxylic Acid; Fluoresceincarboxylic Acid; |
| Molecular Formula | C21H12O7 |
| Purity | ≥95% |
| Storage | -20°C |
| InChIKey | BPVHBBXCESDRKW-UHFFFAOYSA-N |
