Synonyms: Thymolphthalein monophosphate;Phenolphthalein, 5',5''-diisopropyl-2',2''-dimethyl-, mono(dihydrogen phosphate);1(3H)-Isobenzofuranone, 3-(4-hydroxy-2-methyl-5-(1-methylethyl)phenyl)-3-(2-methyl-5-(1-methylethyl)-4-(phosphonooxy)phenyl)-;4-(3-(4-Hydroxy-5-isopropyl-o-tolyl)-1-oxo-3H-isobenzofuran-3-yl)-6-isopropyl-m-tolyl dihydrogen phosphate;magnesium sodium 4-{1-[4-hydroxy-2-methyl-5-(propan-2-yl)phenyl]-3-oxo-1,3-dihydro-2-benzofuran-1-yl}-5-methyl-2-(propan-2-yl)phenyl phosphate (1:2:2);disodium 4-{1-[4-hydroxy-2-methyl-5-(propan-2-yl)phenyl]-3-oxo-1,3-dihydro-2-benzofuran-1-yl}-5-methyl-2-(propan-2-yl)phenyl phosphate;sodium 4-{1-[4-hydroxy-2-methyl-5-(propan-2-yl)phenyl]-3-oxo-1,3-dihydro-2-benzofuran-1-yl}-5-methyl-2-(propan-2-yl)phenyl hydrogen phosphate