m-PEG37-hydrazide contains a hydrazide end group. Hydrazine moieties react with an aldehyde or ketone to form semi-permanent hydrazone bonds, which makes it an ideal aldehyde and ketone labeling tool. The hydrophilic PEG chain can increase the water solubility of the compound.
Axispharm offers 3000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.