Synonyms: Iodophthalein;Iodophene;Jodphthaleinum;3',3'',5',5''-Tetraiodophenolphthalein;Iodophthalein sodium free acid;EINECS 206-857-9;BRN 0351654;3,3-Bis(4-hydroxy-3,5-diiodophenyl)phthalide;Phenolphthalein, 3',3'',5',5''-tetraiodo-;3,3-Bis(4-hydroxy-3,5-diiodophenyl)-1(3H)-isobenzofuranone;1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-3,5-diiodophenyl)-;3,3-bis(4-hydroxy-3,5-diiodophenyl)-2-benzofuran-1(3h)-one;Tetraiodophthalein;AC1Q4PEY;UPCMLD-DP078;AC1L28GK;UNII-R2CC46UA50;UPCMLD-DP078:001;NSC4904;MolPort-003-927-980;NSC-4904;AR-1E8592;SBB057654;AKOS001044034;2217-44-9 (di-hydrochloride salt);NCGC00161636-01;LS-105082;T0126;4-18-00-01949 (Beilstein Handbook Reference);I14-18914;T0515-3074;3,3-bis(4-hydroxy-3,5-diiodophenyl)-2-benzofuran-1-one