Acetonitrile is widely used as a solvent in the purification of pharmaceuticals, particularly in the production of antibiotics and insulin. Its high polarity and ability to dissolve a wide range of compounds make it ideal for chromatographic applications, such as HPLC (High-Performance Liquid Chromatography), where it serves as a mobile phase to separate and analyze complex mixtures. In the chemical industry, it acts as a key intermediate in the synthesis of various organic compounds, including pesticides, perfumes, and rubber products. Additionally, acetonitrile is employed in DNA synthesis and peptide sequencing due to its ability to stabilize and dissolve biomolecules. Its use extends to the extraction of fatty acids and oils, as well as in the manufacturing of batteries, where it functions as an electrolyte solvent.