Cy5.5 Maleimide 1mg


Abs/Em Maxima 678/694 nm
Extinction Coefficient 190,000
Flow Cytometry Laser Line 633 nm or 647 nm
Microscopy Laser Line 633 nm or 647 nm
Spectrally Similar Dyes Alexa Fluor® 680, IRDye® 680RD, CF™ 680 Dye

Cy5.5 Maleimdie (also sold under sulfo-Cyanine5.5 Maleimide name) is a bright and photostable near-IR dye that is spectrally similar to Alexa Fluor® 680, DyLight® 680, and IRDye® 680 dye. Cy5.5 NHS Ester is completely water-soluble and often a reagent of choice for labeling antibodies, peptides, and proteins that are sensitive toward organic co-solvents. Cy5.5 conjugates are pH insensitive from pH 4 to pH 10 and produce minimal autofluorescence of biological specimens in this region of the spectrum. Fluorescence of this long-wavelength Cyanine dye is not visible to the human eye but is readily detected by most imaging systems.

Cy5.5 spectrally is almost identical to Alexa Fluor® 680, CF® 680 Dye, IRDye® 680 or any other Cyanine5.5 based fluorescent dyes, and can be used as a less expensive alternative to these dyes.

This sulfonated dye is also known as sulfo-Cyanine5.5 Maleimdie.


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