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Cyanine 5 bissuccinimidyl ester, potassium salt
same as GE Cy5® bisNHS ester
This Cy5® dye is the same molecule to GE's Cy5® bisNHS ester. It readily reacts with amino groups. It has two NHS groups that might give brighter signal on some proteins than the Cy5 mono NHS ester (#151 and #280). Our Cy5® Fluors are thoroughly QC tested to ensure high levels of chromophore and reactive dye content. A variety of cyanine 5 ( Cy5®) dyes has been used to label biological molecules for fluorescence imaging and other fluorescence-based biochemical analysis. They are widely used for labeling peptides, proteins and oligos etc. Cy5® dyes are one type of the most common red fluorophores. These versatile fluorophores can tolerate a pH range of 3-10 for use in a variety of applications at biologically relevant pHs. The dyes are also DMSO tolerant and photostable to enable transfer from storage to assay without loss of performance. The aqueous solubility eliminates the need for organic solvents in the assay buffers. Cy5® is the trademark of GE Healthcare.
Chemical structure for Cyanine 5 bissuccinimidyl ester, potassium salt [same as GE Cy5® bisNHS ester]
Chemical structure for Cyanine 5 bissuccinimidyl ester, potassium salt [same as GE Cy5® bisNHS ester]
CatalogSize
Price
Quantity
2821 mg
Price
 
Physical properties

Molecular weight975.13
SolventDMSO
Spectral properties

Correction factor (260 nm)0.02
Correction factor (280 nm)0.03
Correction factor (482 nm)0.009
Correction factor (565 nm)0.09
Extinction coefficient (cm -1 M -1)
250000
1
Excitation (nm)651
Emission (nm)670
Quantum yield
0.27
1
0.4
2
Storage, safety and handling

Certificate of OriginDownload PDF
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 12, 2025