Also Called: 1,3-Isobenzofurandione, 4,5,6,7-tetrachloro-;tetrachlorophthalic anhydride;Tetrachlorphthals‰ureanhydrid;Tetrachlorphthalsäureanhydrid;1,3-DIOXY-4,5,6,7-TETRACHLOROISOBENZOFURAN;4,5,6,7-TETRACHLOR-1,3-ISOBENZOFURANDION;4,5,6,7-Tetrachloro-1,3-isobenzofurandione;anidride tetracloroftalica