Xylenol orange sodium salt63721-83-540 % similar Calcein1461-15-040 % similar Bromophenol red2800-80-839 % similar Chlorophenol red4430-20-039 % similar Bromopyrogallol red16574-43-939 % similar Bromothymol blue76-59-538 % similar Phenol red sodium34487-61-136 % similar N-Benzylaminodiacetic acid3987-53-936 % similar Thymol blue sodium salt62625-21-235 % similar Calcein blue54375-47-234 % similar Bromthymol blue sodium34722-90-234 % similar (2-Methylphenyl)acetic acid644-36-031 % similar O-Cresolphthalein596-27-031 % similar 3-(2-Methylphenyl)propionic acid22084-89-530 % similar