Azido-PEG-CH2CO2-NHS is a reactive chemical compound that belongs to the class of PEGylated reagents, which are widely used in various biomedical applications. The molecule is characterized by the presence of several functional groups, including azide, carboxylic acid, and NHS ester groups. The azide group is particularly useful for bioconjugation reactions, as it can undergo click chemistry with alkynes or other strained cyclic compounds. The NHS ester group is also commonly used in protein modification and drug delivery applications. In pharmaceutical research and development, Azido-PEG-CH2CO2-NHS is often used for the modification of peptides, proteins, and other biomolecules to enhance their stability, solubility, and pharmacokinetic properties. It is also used in the development of targeted drug delivery systems and in the study of protein-protein interactions.