XFD488 NHS Ester *Same Structure to Alexa Fluor(TM) 488 NHS Ester*

Molecular weight: 643.40. Excitation (nm): 499. Emission (nm): 520. Extinction coefficient (cm-1 M-1): 73000. Quantum yield: 0.92. Correction factor (280 nm): 0.11. XFD488 NHS Ester (Succinimidyl Ester) is the same molecule to the Alexa Fluor(R) 488 NHS Ester (Alexa Fluor(R) is the trademark of ThermoFisher). It is a bright green-fluorescent dye optimal for use with the 488 nm Argon laser. XFD488 dye is water soluble and pH-insensitive from pH 4 to pH 10. The NHS ester (or succinimidyl ester) of XFD488 is the most convenient amine-reactive form for conjugating this dye to a protein or antibody.