Used as an analytical reagent for the detection and separation of metal ions, particularly in qualitative inorganic analysis. It forms colored complexes with certain metals, aiding in their identification. Also employed in organic synthesis as an intermediate in the preparation of nitriles and amides through dehydration or rearrangement reactions. It serves as a starting material for synthesizing cyclic compounds such as oxazoles and isoxazoles, which are important in pharmaceutical and biological applications. Additionally, it serves as a protecting group for aldehydes in multi-step synthesis due to its reversible formation under mild conditions.