Cyanine5.5 NHS ester

Cat. # Quantity Price Lead time
17020 1 mg $110.00 in stock
27020 5 mg $210.00 in stock
47020 25 mg $410.00 in stock
57020 50 mg $695.00 in stock
67020 100 mg $1190.00 in stock

Cyanine5.5 NHS ester is a reactive dye for the labeling of amino-groups in peptides, proteins, and oligonucleotides, an analog of Cy5.5® NHS ester.

Cy5.5 is a far-red (and near-infrared) emitting dye which is ideal for fluorescence measurements where background fluorescence is a concern. It is also suitable for in vivo NIR imaging experiments.

This reagent can replace NHS esters of Cy5.5®, Alexa Fluor 680, and DyLight 680.

Cy5.5 absorbance and emission spectra

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General properties

Appearance: dark blue powder
Molecular weight: 716.31
Molecular formula: C44H46ClN3O4
Solubility: soluble in organic solvents (DMSO, DMF, dichloromethane), low solubility in water
Quality control: NMR 1H, HPLC-MS (95%)
Storage conditions: Storage: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.
MSDS: Download

Spectral properties

Excitation maximum, nm: 673
ε, L⋅mol−1⋅cm−1: 209000
Emission maximum, nm: 707
Fluorescence quantum yield: 0.2
CF260: 0.11
CF280: 0.08

Product citations

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