Xylenol orange1611-35-442 % similar Eriochrome cyanine R3564-18-941 % similar O-Cresolphthalein596-27-040 % similar Xylenol orange tetrasodium salt3618-43-739 % similar 4-tert-Butylcatechol98-29-338 % similar Bromthymol blue sodium34722-90-236 % similar Alpha-Naphtholphthalein596-01-033 % similar Biscresolfluorene88938-12-933 % similar Methylthymol blue1945-77-333 % similar Phenolphthalein77-09-832 % similar 2,4-Bis(phenylsulfonyl)phenol177325-75-632 % similar 2,4-Dicumylphenol2772-45-432 % similar Sodium O-phenolsulfonate1300-51-231 % similar 2-Sulfobenzoic acid cyclic anhydride81-08-331 % similar P-Xylenolphthalein50984-88-831 % similar 3,4-Dihydroxybenzophenone10425-11-330 % similar 1-Naphthol-4-sulfonic acid84-87-730 % similar 1,1′-[(1-Methylethylidene)di-4,1-phenylene] bis(2-aminobenzenesulfonate)68015-60-130 % similar Thymolphthalein125-20-230 % similar