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Cyanine5 maleimide Cat. # Quantity Price 13080 1mg 1760.00 23080 5mg 3360.00 43080 25mg 6560.00 53080 50mg 11120.00 63080 100mg 17600.00 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. Cyanine5 is an analog of Cy5®, a common fluorophore which is compatible with various instrumentation like microscopes, imagers, and fluorescence readers. For the labeling of antibodies and sensitive proteins we recommend to use the water soluble sulfo-Cyanine5 maleimide. 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, HPLC-MS (95%) 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. Spectral properties Excitation maximum, nm: 646 ε, L⋅mol−1⋅cm−1: 250000 Emission maximum, nm: 662 Fluorescence quantum yield: 0.2