Catalog # Availability Size / Price Qty
TFAX 488, TFP | CAS No. 878546-79-3 | TFAX Dyes
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Description: Green fluorescent dye; amine reactive

Chemical Name: 3,6-Diamino-9-[2-carboxy-4-[(2,3,5,6-tetrafluorophenoxy)carbonyl]phenyl]-4,5-disulfoxanthylium bis(triethylammmonium) salt

Product Details

Biological Activity

Amine reactive green fluorescent dye. Insensitive to pH in the range 4 - 10. Forms bright and photostable conjugates with proteins and antibodies. Less susceptible to spontaneous hydrolysis during conjugation reactions compared to SE or NHS dyes. Also displays greater stability compared to NHS and SE versions, typically lasting several hours. Suitable for use in flow cytometry, two-photon excitation microscopy (TPE), and super resolution microscopy techniques, such as dSTORM, SIM and STED. Excitation maximum = 495 nm; emission maximum = 515 nm; extinction coefficient = 73,000 M-1cm-1; quantum yield = 0.92.

Optical Data for TFAX 488, TFP

Emission Color Green
λabs 495 nm
λem 515 nm
Extinction Coefficient (ε) 73,000 M-1cm-1
Quantum Yield (φ) 0.92
Closest Laser line 488 nm
Reactive Group TFP
Reactivity Primary amines
Cell Permeable No
pH Sensitivity pH insensitive pH 4-10
Application flow cytometry, two-photon excitation microscopy, dSTORM, SIM, STED
Alternative For Alexa Fluor® 488 TFP ester, AF 488, FITC, Cy2

Alexa Fluor® is a registered trademark of Molecular Probes, Inc, a Thermo Fisher Scientific Company.

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Technical Data

Soluble in DMSO
Store the unopened product at -20 to -70 °C. Use a manual defrost freezer and avoid repeated freeze-thaw cycles. Do not use past expiration date.

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.

Background References

  1. On the seeding and oligomerization of pGlu-amyloid peptides (in vitro).
    Schilling et al.
    Biochemistry, 2006;45:12393

Product Datasheets

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