Acetyl Chloride, with the CAS number 75-36-5, has the chemical formula C₂H₃ClO or CH₃COCl and a molecular weight of 78.50. It is a colorless, fuming liquid with a strong, pungent odor.

Uses:As an organic synthesis raw material, acetyl chloride is used in the production of pesticides, pharmaceuticals, and novel electroplating complexing agents. It serves as a catalyst for the chlorination of carboxylic acids, an acetylating reagent, and an intermediate in various fine organic syntheses.