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iFluor® 546 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® 546 dyes have fluorescence excitation and emission maxima essentially identical to those of Alexa Fluor® 546 dyes. These spectral characteristics make them excellent alternatives to Alexa Fluor® 546 dyes (Alexa Fluor® is the trademark of Invitrogen). Under the same conditions we tested, iFluor® 546-labeled anti-IgG and streptavidin conjugates are brighter and more photostable than the corresponding Alexa Fluo® 546 conjugates. iFluor® 546 SE is reasonably stable and shows good reactivity and selectivity with protein amino groups.
HeLa cells were stained with (Tubulin+) or without (Tubulin-) mouse anti-tubulin and then visualized with iFluor® 546 goat anti-mouse IgG (Left) or with Alexa Fluor® 546 goat anti-mouse IgG (Right).
HeLa cells were stained with (Tubulin+) or without (Tubulin-) mouse anti-tubulin and then visualized with iFluor® 546 goat anti-mouse IgG (Left) or with Alexa Fluor® 546 goat anti-mouse IgG (Right).
CatalogSize
Price
Quantity
10481 mg
Price
71048100 ug
Price
715215 mg
Price
7157110 mg
Price
 
Physical properties

Molecular weight1145.41
SolventDMSO
Spectral properties

Correction factor (260 nm)0.25
Correction factor (280 nm)0.15
Extinction coefficient (cm -1 M -1)
100000
1
Excitation (nm)541
Emission (nm)557
Quantum yield
0.67
1
Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12171501
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Page updated on October 8, 2025