mPEG-Succinimidyl Amido Succinate (mPEG-SAS), MW 2K is a succinimidyl PEG polymer that is a white solid or viscous liquid, depending on its molecular weight. The smaller the molecule, the more likely it is to be a solid. Soluble in most organic solvents, soluble in water.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.