Xylenol orange1611-35-4100 % similar Xylenol orange tetrasodium salt3618-43-775 % similar O-Cresolphthalein complexone2411-89-467 % similar Bromocresol purple115-40-257 % similar Cresol red1733-12-651 % similar Eriochrome cyanine R3564-18-951 % similar Iodophenol blue4430-24-450 % similar Bromocresol purple sodium62625-30-349 % similar Bromophenol blue115-39-948 % similar Xylenol blue125-31-544 % similar Methylthymol blue1945-77-344 % similar Metacresol purple2303-01-744 % similar Alizarin complexone3952-78-144 % similar Cresol red sodium62625-29-044 % similar Bromochlorophenol blue2553-71-143 % similar Pyrocatechol violet115-41-342 % similar Phenol red143-74-842 % similar Bromophenol blue sodium salt33551-92-741 % similar Bromocresol green76-60-841 % similar Thymol blue76-61-941 % similar