SG-PEG-SG (Succinimidyl Glutarate ester-PEG-Succinimidyl Glutarate ester), MW 5K is a kind of NHS-PEG-NHS ester reagent. There is a C3 aliphatic ester linkage between the PEG and the NHS ester.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.