6-FAM SE is an enantiomer of carboxyfluorescein. 6-FAM SE is mainly used for nucleic acid sequencing and labeling nucleotides.

Physicochemical Properties

Molecular Formula	C25H15NO9
Molecular Weight	473.3879
Exact Mass	473.074
CAS #	92557-81-8
Related CAS #	6-FAM;3301-79-9
PubChem CID	2762614
Appearance	Yellow to orange solid powder
Density	1.7±0.1 g/cm3
Boiling Point	788.1±70.0 °C at 760 mmHg
Flash Point	430.4±35.7 °C
Vapour Pressure	0.0±2.8 mmHg at 25°C
Index of Refraction	1.790
LogP	0.71
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	9
Rotatable Bond Count	3
Heavy Atom Count	35
Complexity	894
Defined Atom Stereocenter Count	0
InChi Key	VDABVNMGKGUPEY-UHFFFAOYSA-N
InChi Code	InChI=1S/C25H15NO9/c27-13-2-5-16-19(10-13)33-20-11-14(28)3-6-17(20)25(16)18-9-12(1-4-15(18)24(32)34-25)23(31)35-26-21(29)7-8-22(26)30/h1-6,9-11,27-28H,7-8H2
Chemical Name	(2,5-dioxopyrrolidin-1-yl) 3',6'-dihydroxy-1-oxospiro[2-benzofuran-3,9'-xanthene]-5-carboxylate
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month Note: This product requires protection from light (avoid light exposure) during transportation and storage.
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

Additional Infomation

6-carboxyfluorescein succinimidyl ester is an N-hydroxysuccinimide ester derived from 6-carboxyfluorescein. A fluorescent cell staining dye, it is cell permeable and covalently couples, via its succinimidyl group, to intracellular molecules, notably to intracellular lysine residues. It has a role as a fluorochrome. It is functionally related to a fluorescein (lactone form).

Solubility Data

Solubility (In Vitro)

DMSO : ~50 mg/mL (~105.62 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (5.28 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.5 mg/mL (5.28 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.1124 mL	10.5621 mL	21.1242 mL
	5 mM	0.4225 mL	2.1124 mL	4.2248 mL
	10 mM	0.2112 mL	1.0562 mL	2.1124 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.