Cyanine5 carboxylic acid Cat. # Quantity Price 13090 1mg 1760.00 23090 5mg 3360.00 43090 25mg 6560.00 53090 50mg 11120.00 63090 100mg 17600.00 Non-activated carboxylic acid, an analog of Cy5® free carboxylic acid. Contains Cyanine5 fluorophore. This dye has limited water solubility, but can be dissolved in mixtures of water with organic phase (DMF, DMSO, alcohols) to obtain useful concentrations of the material in solution. Water-soluble version is available. This molecule can be considered non-reactive dye for the use in control samples, and for instrument calibration. For coupling with amines and protein labeling, consider using Cyanine5 NHS ester, or water-soluble sulfo-Cyanine5 NHS ester. General properties Appearance: dark blue powder Molecular weight: 519.12 Molecular formula: C32H39ClN2O2 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