5(6)-Carboxyfluorescein

5(6)-Carboxyfluorescein (5(6)-FAM) is an amine-reactive pH-sensitive green fluorescent probe. 5(6)-Carboxyfluorescein (5(6)-FAM) can be used to label proteins, peptides and nucleotides. 5(6)-Carboxyfluorescein can be used for the detection of tumour areas in vivo.

Product information

CAS Number: 72088-94-9

Molecular Weight: 752.63

Formula: C42H24O14

Synonym:

5(6)-FAM

5-(and-6)-Carboxyfluorescein mixed isomers

Chemical Name: 3',6'-dihydroxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthene]-5-carboxylic acid; 3',6'-dihydroxy-3-oxo-3H-spiro[2-benzofuran-1,9'-xanthene]-6-carboxylic acid

Smiles: OC(=O)C1=CC2=C(C=C1)C(=O)OC12C2=CC=C(O)C=C2OC2=CC(O)=CC=C12.OC(=O)C1=CC2=C(C=C1)C1(OC2=O)C2=CC=C(O)C=C2OC2=CC(O)=CC=C12

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)

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO : ≥ 41 mg/mL (54.48 mM)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

5(6)-Carboxyfluorescein has two main characteristics: it has two wavelengths of maximum absorbance (465 and 490 nm) and its fluorescence emission (maximum, 515 nm) increases as a function of pH in the physiological pH range of 6-7.4.

In Vivo:

5(6)-Carboxyfluorescein (5 mg/kg; i.p.) can be used for in vivo pH mapping of tumor tissue.

References:

1. Maksim V Kvach, et al. 5(6)-carboxyfluorescein revisited: new protecting group, separation of isomers, and their spectral properties on oligonucleotides. Bioconjug Chem. Sep-Oct 2007;18(5):1691-6.
2. Wen Ma, et al. A Cell Membrane-Targeting Self-Delivery Chimeric Peptide for Enhanced Photodynamic Therapy and In Situ Therapeutic Feedback. Adv Healthc Mater. 2020 Jan;9(1):e1901100.

Products are for research use only. Not for human use.