XFD350 NHS Ester *Same Structure to Alexa Fluor(TM) 350 NHS Ester*

Molecular weight: 410.35. Excitation (nm): 343. Emission (nm): 441. Extinction coefficient (cm-1 M-1): 19000. Correction factor (260 nm): 0.25. XFD350 NHS Ester (Succinimidyl Ester) is the same molecule to the Alexa Fluor(R) 350 NHS Ester (Alexa Fluor(R) is the trademark of ThermoFisher). It is a blue-fluorescent dye optimal for use with the 350 nm UV laser. XFD350 dye is water soluble and pH-insensitive from pH 4 to pH 10. The NHS ester (or succinimidyl ester) of XFD350 is the most convenient amine-reactive form for conjugating this dye to a protein or antibody.