Used primarily as a reactive intermediate in organic synthesis, especially in the preparation of hydroxamic acids, which are known for their metal-chelating properties. It serves as a key building block in pharmaceuticals, particularly in the development of histone deacetylase (HDAC) inhibitors used in cancer therapy. Also employed in polymer chemistry to introduce functional groups that enhance water solubility and reactivity in hydrogels and functional coatings. Its ability to form stable conjugates with biomolecules makes it useful in bioconjugation techniques and diagnostic reagent design.