Thymol blue sodium salt62625-21-2100 % similar Thymol blue76-61-981 % similar Xylenol blue125-31-561 % similar Cresol red sodium62625-29-058 % similar Bromthymol blue sodium34722-90-255 % similar Bromothymol blue76-59-552 % similar Metacresol purple2303-01-750 % similar Thymolphthalein125-20-249 % similar Cresol red1733-12-649 % similar Methylthymol blue1945-77-349 % similar Bromocresol purple sodium62625-30-346 % similar Sodium thymolphthalein monophosphate28749-63-546 % similar Pyrocatechol violet115-41-345 % similar Eriochrome cyanine R3564-18-943 % similar Phenol red sodium34487-61-143 % similar Bromophenol blue sodium salt33551-92-742 % similar Bromocresol purple115-40-242 % similar Xylenol orange tetrasodium salt3618-43-741 % similar Bromophenol red2800-80-840 % similar Chlorophenol red4430-20-040 % similar