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iFluor® 670 succinimidyl ester
AAT Bioquest's iFluor® dyes are optimized for labeling proteins, particularly antibodies. These dyes are bright, photostable, and have minimal quenching on proteins. They can be well excited by the major laser lines of fluorescence instruments (e.g., 350, 405, 488, 555, and 633 nm). iFluor® 670 family has spectral properties nearly identical to those of Cy5B. Compared to Cy5B, iFluor® 670 has a much higher fluorescence quantum yield with greatly enhanced photostability. In addition, the fluorescence of iFluor® 670 is pH-insensitive over a broad range, pH 3-11. These spectral characteristics make this new dye family a superior alternative to Cy5B. iFluor® 670 SE is reasonably stable and shows good reactivity and selectivity with protein amino groups.
HeLa cells were incubated with (+ Tubulin) or without (-Tubulin) mouse anti-tubulin followed by iFluor® 670 goat anti-mouse IgG conjugate stain and visualized with Cy5 Filter.
HeLa cells were incubated with (+ Tubulin) or without (-Tubulin) mouse anti-tubulin followed by iFluor® 670 goat anti-mouse IgG conjugate stain and visualized with Cy5 Filter.
CatalogSize
Price
Quantity
10331 mg
Price
71033100 ug
Price
715125 mg
Price
7156210 mg
Price
 
Physical properties

Molecular weight923.15
SolventDMSO
Spectral properties

Correction factor (260 nm)0.03
Correction factor (280 nm)0.033
Extinction coefficient (cm -1 M -1)
200000
1
Excitation (nm)671
Emission (nm)682
Quantum yield
0.55
1
Storage, safety and handling

Intended useResearch Use Only (RUO)
StorageFreeze (< -15 °C); Minimize light exposure
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Page updated on October 8, 2025