There are two methods for conjugation/attachment to choose from, depending on which
KODAK X-SIGHT Large Stokes Shift Dye you use. Please select the link that corresponds to your dye of interest.

KODAK X-SIGHT 640 Large Stokes Shift Dye, NHS Ester

KODAK X-SIGHT 670 Large Stokes Shift Dye, TFP Ester