This chemical is primarily utilized in the field of bioconjugation and protein modification due to its reactive functional groups. The presence of the dioxopyrrole moiety enables it to act as a linker for attaching biomolecules, such as proteins or peptides, to other substrates or probes. It is particularly valuable in creating stable amide bonds with amino groups, making it useful in the development of diagnostic assays, drug delivery systems, and targeted therapies. Additionally, its polyethylene glycol (PEG) chain enhances solubility and biocompatibility, reducing immunogenicity and improving the pharmacokinetic properties of conjugated molecules. This makes it a versatile tool in biomedical research and therapeutic applications.