This compound, featuring a maleimide group and a hydrazide functionality connected by an 11-carbon aliphatic chain, serves as a key intermediate in the synthesis of functional polymers and bioconjugates. The maleimide enables selective conjugation to thiol groups, forming stable thioether linkages, while the hydrazide facilitates reactions with aldehydes (forming hydrazones) or activated carboxylic acids (forming acylhydrazides). It is particularly valuable in bioconjugation chemistry for linking proteins, peptides, or fluorescent labels to other molecules or surfaces. The long aliphatic chain provides flexibility and optimal spacing, making it suitable for applications in drug delivery systems, biosensors, and surface modification of biomaterials. Additionally, it is used in crosslinking hydrogels and polymer networks where controlled reactivity and spacer length are crucial.