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Cy5.5, free acid


Cy5.5 is a bright, near-IR fluorescent dye. It has been shown to be useful as fluorescent label for biological compounds. Cy5.5 is intensely fluorescent and highly water soluble.  

The NHS ester (or succinimidyl ester) is the most popular amine reactive group for labeling with the primary amines (R-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The resulting CyDye conjugate will exhibit brighter fluorescence and greater photostability than the conjugates of other spectrally similar fluorophores.

Ex/Em: 675/694 nm
Extinction coefficient: 250,000
Molecular weight: 1303.6
Excitation source: 680 nm
Product Size: 1 mg
Storage Conditions: -20 ℃, protect from light
Shipping Condition: Ice pack


Fluorescent labeling

To order

Buy Cat.No. Product Name Ex/Em(nm) Unit Price
C169 Cy5.5 free acid 675/694 5 mg $275


Protocol (PDF): CyDye NHS Esters
Quick Reference (PDF): CyDye Quick Reference
MSDS (PDF): C169