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Cy3, Bis free acid


Cy3 is a bright, orange fluorescent dye. Cy3 Bis NHS ester contains two reactive groups on each dye molecule. It has been shown to be useful as fluorescent label for biological compounds. Cy3 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: 550/570 nm
Extinction coefficient: 150,000
Molecular weight: 1012
Excitation source: 555 nm
Product Size: 5 mg
Storage Conditions: -20 ℃, protect from light
Shipping Condition: Ice pack


Fluorescent labeling, HTS

To order

Buy Cat.No. Product Name Ex/Em(nm) Unit Price
C180 Cy3 Bis free acid 550/570 5 mg $275


Protocol (PDF): CyDye NHS Esters
Quick Reference (PDF): CyDye Quick Reference
MSDS (PDF): C180