(Science: chemical) 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro(isobenzofuran-1(3h),9'-(9h)xanthen)-3-one dipotassium salt. A bright bluish pink compound that has been used as a dye, biological stain, and diagnostic aid.
Pharmacological action: fluorescent dyes.
Chemical name: Rose Bengal
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Some dyes like rose bengal are used functionally in selective media but I'm not aware of selective dyes used as pH indicators. I'd ...
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