Eriochrome cyanine R3564-18-9100 % similar Bromocresol purple sodium62625-30-366 % similar Xylenol orange tetrasodium salt3618-43-758 % similar Bromocresol purple115-40-256 % similar Bromophenol blue sodium salt33551-92-755 % similar Cresol red sodium62625-29-053 % similar Xylenol orange1611-35-451 % similar Cresol red1733-12-649 % similar Iodophenol blue4430-24-448 % similar Bromophenol blue115-39-946 % similar Phenol red sodium34487-61-145 % similar Bromthymol blue sodium34722-90-245 % similar Thymol blue sodium salt62625-21-243 % similar Xylenol blue125-31-543 % similar Metacresol purple2303-01-743 % similar Bromochlorophenol blue2553-71-142 % similar Methylthymol blue1945-77-342 % similar Pyrocatechol violet115-41-341 % similar Phenol red143-74-840 % similar Bromocresol green76-60-840 % similar