PCL(2k)-PEG(1k)-RhB is a self-assembling block copolymer containing a hydrophilic PEG attached to a hydrophobic polycaprolactone (PCL) block. The polymer has terminal red dye on one end and hydroxyl on another end for further derivatization. The ester bonds of the polymer can be cleaved via hydrolysis. Reagent grade, for research purpose.