I-acetic anhydride ((CH3CO)2O) — uketshezi olunuka kabi olusetshenziswa njengesenzi se-acetyl ekwakhiweni kwe-organic. Lusebenzisana nama-amine, notshwala nama-phenol lwakhe imikhiqizo ye-acetyl. Yisisetshenziswa esiyinhloko ekwenziweni kwe-aspirin, i-cellulose acetate nezinye izinto eziphakathi zopende. Iyaguguleka — ikhipha umhwamuko we-acetic acid.