OG 488, SE

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Cat.No. 6257 - OG 488, SE | C25H13F2NO9 | CAS No. 198139-51-4
Description: Green fluorescent dye; supplied as NHS ester
Chemical Name: 2',7'-Difluoro-3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthene]-5-carboxylic acid 2,5-dioxo-1-pyrrolidinyl ester
Protocols (1)
Literature (1)

Biological Activity

Green fluorescent dye. pH-insensitive in physiological pH range (pKa = 4.6). Can be used to monitor pH change in acidic organelles or pathways. Excitation/emission λ 501/526 nm.

Optical Data for OG 488, SE

OG 488, SE Dye Spectra
Emission Color Green
λabs 496 nm
λem 516 nm
Extinction Coefficient (ε) 76,000 M-1cm-1
Quantum Yield (φ) 0.9
Closest Laser line 488 nm
Reactive Group NHS ester
Reactivity Primary amines
pH Sensitivity pH-insensitive in physiological pH range (pKa = 4.6)
Correction Factor 280 0.12
Application Imaging, acidic organelle probe, flow, STED
Alternative For TFAX 488, SE, 5(6)-SFX (Fluorescein), SE, FITC,

Plan Your Experiments

Use our spectra viewer to interactively plan your experiments, assessing multiplexing options. View the excitation and emission spectra for our fluorescent dye range and other commonly used dyes.

Spectral Viewer

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Technical Data

M. Wt 509.37
Formula C25H13F2NO9
Storage Store at -20°C
CAS Number 198139-51-4
PubChem ID 58720805
Smiles OC1=C(F)C=C(C(C2=CC=C(C(ON3C(CCC3=O)=O)=O)C=C2C(O)=O)=C(C=C4F)C(O5)=CC4=O)C5=C1

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.

Tocris products are intended for laboratory research use only, unless stated otherwise.

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
DMSO 0.51 1

Preparing Stock Solutions

The following data is based on the product molecular weight 509.37. Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Select a batch to recalculate based on the batch molecular weight:
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
0.01 mM 196.32 mL 981.6 mL 1963.21 mL
0.05 mM 39.26 mL 196.32 mL 392.64 mL
0.1 mM 19.63 mL 98.16 mL 196.32 mL
0.5 mM 3.93 mL 19.63 mL 39.26 mL

Molarity Calculator

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*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

Reconstitution Calculator

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Dilution Calculator

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References are publications that support the biological activity of the product.

Vergene et al (1998) Phagosomal pH determination by dual fluorescence flow cytometry. Anal.Biochem. 255 127 PMID: 9448851

If you know of a relevant reference for OG 488, SE, please let us know.

Keywords: OG 488, SE, OG 488, SE supplier, OG488SE, green, fluorescent, dye, NHS, ester, Standard, Fluorescein,, Coumarin, and, Rhodamine, Dyes, Flow, Cytometry, 6257, Tocris Bioscience

Citations for OG 488, SE

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Protocols for OG 488, SE

The following protocol features additional information for the use of OG 488, SE (Cat. No. 6257).

Literature in this Area

Tocris offers the following scientific literature in this area to showcase our products. We invite you to request* or download your copy today!

*Please note that Tocris will only send literature to established scientific business / institute addresses.

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