ButyrAldehyde-PEG-ButyrAldehyde(PEG-bis-Butyraldehyde, bALD-PEG-Bald), MW 5K is a PEG polymer containing two aldehyde groups that can react with hydrazide or amine groups.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.