SAS-PEG-SAS (PEG-bis-Succinimidyl Amido Succinate), MW 20K is a PEG reagent with a C2 aliphatic amide bond between PEG and NHS ester, with two succinimide (NHS) groups .
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.