PCL(3k)-PEG(5k)-FITC is a micelle-forming block copolymer with polycaprolactone (PCL) as hydrophobic segment and PEG as hydrophilic block. The FITC can be used for staining cells, tissues, biomarkers or nanoparticles. FITC has peak absorption or excitation at 494 nm and maximum emission at 521 nm. Reagent grade, for research purpose.