XFD594 NHS Ester *Same Structure to Alexa Fluor(TM) 594 NHS Ester*

Molecular weight: 819.85. Excitation (nm): 590. Emission (nm): 618. Extinction coefficient (cm-1 M-1): 92000. Quantum yield: 0.66. Correction factor (280 nm): 0.56. XFD594 NHS Ester (Succinimidyl Ester) is the same molecule to the Alexa Fluor(R) 594 NHS Ester (Alexa Fluor(R) is the trademark of ThermoFisher). It is a bright red-fluorescent dye optimal for use with the frequency-doubled He-Ne laser line. XFD594 dye is water soluble and pH-insensitive from pH 4 to pH 10. The NHS ester (or succinimidyl ester) of XFD594 is the most convenient amine-reactive form for conjugating this dye to a protein or antibody.