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DescriptionColor change of thymol blue at different pH.jpg
English: A photo showing thymol blue at different pH, the left one in acidic solution, the middle one in neutral solution, the right one in alkaline solution
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{{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|A photo showing thymol blue at different pH, the left one in acidic solution, the middle one in neutral solution, the right one in alkaline solution}} |Source = Own work |Date ...