Phthalic-13C6 anhydride is an isotope labelled analog of Phthalic anhydride. Phthalic Anhydride is an organic compound and 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.