Cyanine5 maleimide

Cat. # Quantity Price Stock

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13080 1 mg 110.00$ in stock
23080 5 mg 210.00$ in stock
43080 25 mg 410.00$ in stock
53080 50 mg 695.00$ in stock
63080 100 mg 1190.00$ in stock

Cyanine5 maleimide is a mono-reactive dye which selectively couples with thiol groups (for example, with cysteines in peptides and proteins) to give labeled conjugates.

We recommend to use water soluble sulfo-Cyanine5 maleimide for the labeling of antibodies and sensitive proteins.

Cyanine5 is an analog of Cy5®, a common fluorophore which is compatible with various instrumentation like microscopes, imagers, and fluorescence readers.

Cy5 excitation and emission spectra

General properties

Appearance: dark blue powder
Molecular weight: 641.24
Molecular formula: C38H45ClN4O3
Solubility: soluble in organic solvents (DMF, DMSO, dichloromethane), insoluble in water
Quality control: NMR 1H (95%) and 13C, TLC, functional testing
Storage conditions: Storage: 24 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: 646
Extinction coefficient at excitation maximum, Lmol-1cm-1: 250000
Emission maximum, nm: 662
Fluorescence quantum yield: 0.2
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