m-PEG-azide, MW 3.5K is a monofunctional PEG derivative that can be used to modify proteins, peptides and other materials. It is an azide-containing PEG polymer that reacts with alkynes, DBCO and BCN by CuAAC/SPAAC Click Chemistry.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.