Acetonitrile (CAS No. 75‑05‑8; formula CH₃CN; MW 41.05 g/mol) is a colorless, volatile, polar aprotic liquid with high purity. It is miscible with water and organic solvents, has a boiling point around 82 °C, and serves as a versatile industrial-grade solvent for chemical synthesis, extraction, analytical chromatography, and purification processes.