Cyanine5 NHS ester bromide

Guidelines (the following is our recommended protocol; this protocol is provided for guidance only and should be modified according to your specific needs).
Cyanine5 NHS ester bromide can be excitable with a red (635 nm) and a 488 nm argon laser, respectively^[1].
Cyanine5 NHS ester bromide applys for characterization^[1]:
1. Acquire high resolution mass spectra (HRMS) with Agilent 6540 UHD Accurate-Mass QTOF LC/MS system coupled to an Agilent 1290 HPLC system, using an ESI source.
2. Perform preparative HPLC with a system from Knauer (Berlin, Germany). A Kinetex-XB C18, 5 μm, 250 × 21 mm (Phenomenex, Aschaffenburg, Germany) is used as stationary phase. Mixtures of 0.1% aq TFA and acetonitrile are used as mobile phase. The flow rate is 18-20 mL/min, and a detection wavelength of 220 nm is used throughout.
3. Analysis HPLC with a system from Agilent Technologies. A Kinetex-XB C18, 2.6 μm, 100 × 3 mm (Phenomenex) serves as stationary phase at a flow rate of 0.5-0.6 mL/min. The oven temperature is set to 25 °C. Mixtures of 0.04% aq TFA and acetonitrile are used as mobile phase. The injection volume is 20 μL. Detection is performed at 220 nm.

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.