This compound is widely used in bioconjugation and drug delivery systems due to its polyethylene glycol (PEG) spacer, which enhances solubility and reduces immunogenicity. It is particularly valuable in modifying peptides, proteins, and antibodies to improve their pharmacokinetic properties. The methylamino group allows for efficient coupling with carboxylic acids or activated esters, making it a versatile linker in the synthesis of targeted therapeutics. Additionally, it is employed in the development of antibody-drug conjugates (ADCs) and other biopharmaceuticals, where it helps maintain stability and prolongs circulation time in the body. Its application extends to nanotechnology, where it is used to functionalize nanoparticles for improved biocompatibility and targeted delivery.