m-PEG-Succinimidyl Valerate(m-PEG-SVA), MW 2K is a PEG derivative containing an amino group (-NH2). NHS ester reacts with a primary amino group to form a stable amide bond. The pH must be between 7 and 8.5. for medical research.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.