Azide-PEG-Azide(N3-PEG-N3), MW 1K is a homobifunctional PEG polymer. Each end contains an azido (N3) group. The azido groups at both ends can react with copper-catalyzed alkynes in aqueous solution and can be easily reduced to amines.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.