Bis-(Norbornene-PEG23)-disulfides contains two norbornene groups and a cleavable disulfide bond. Norbornene is a highly strained bridged cyclic hydrocarbon and are important monomers in ring-opening metathesis polymerizations (ROMP). The disulfide bond can be cleaved under reduction condition.n Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.