Synonyms: Phenolphthalein,3',3'',5',5''-tetrabromo-, ethyl ester (7CI); o-Toluic acid, a-(3,5-dibromo-4-hydroxyphenyl)-a-(3,5-dibromo-4-oxo-2,5-cyclohexadien-1-ylidene)-,ethyl ester (8CI); 3',3'',5',5''-Tetrabromophenolphthalein ethyl ester;Bromophthalein Margenta E; Ethyl tetrabromophenolphthalein; NSC 16214;Tetrabromophenolphthalein ethyl ester