Xylenol blue125-31-5100 % similar Thymol blue76-61-974 % similar Cresol red1733-12-670 % similar Metacresol purple2303-01-768 % similar Thymol blue sodium salt62625-21-261 % similar Pyrocatechol violet115-41-358 % similar Cresol red sodium62625-29-057 % similar Bromocresol purple115-40-255 % similar Bromophenol red2800-80-853 % similar Chlorophenol red4430-20-053 % similar P-Xylenolphthalein50984-88-853 % similar Iodophenol blue4430-24-452 % similar Bromocresol green76-60-852 % similar Phenol red143-74-851 % similar Bromopyrogallol red16574-43-949 % similar Bromophenol blue115-39-949 % similar Bromothymol blue76-59-547 % similar Bromochlorophenol blue2553-71-146 % similar Bromocresol purple sodium62625-30-346 % similar Xylenol orange1611-35-444 % similar