THYMOLPHTHALEIN ACS GRADE excellent quality manufacturer, exporter and supplier. Thymolphthalein (5′, 5′′-Diisopropyl-2′, 2′′-dimethylphenolphthalein) is an acid-base indicator which is colorless in solutions with a pH below 8.5 and blue in solutions with a pH above 9.5. Thymolphthalein has been used as an indicator in periodate-thiosulfate reaction. Thymolphthalein has been used as a pH indicator in urea breath test to determine when the CO2 trap is full.

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