Acetic Anhydride
The largest volume use for acetic anhydride is as a raw material for cellulose acetate fibers and plastics. Acetic anhydride is also a significant raw material for aspirin,acetaminophen and other pharmaceuticals. It is a raw material for plasticizers such as acetyl tributyl citrate and triacetin; for acetyl peroxide; and for acetylated vegetable oils. It has many other uses as an acetylating agent.