Phthalic Anhydride (Phenyl-13C6, D4) is labelled Phthalic Anhydride (P384485) which is the anhydride of phthalic acid (P384480). Phthalic Anhydride is an important industrial chemical commonly used in large-scale production of plasticizers for plastics. Recent research have also evaluated Phthalic Anhydride as potential antibacterial agent.