m-PEG-Succinimidyl Carbonate (MPEG-SC), MW 30K is a water-soluble polymer with succinimide end groups. NHS esters form stable amide bonds with primary amine reactive groups at pH 7–10.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.