SURAT CHEMICAL TAG:
Thymolphthalein is used in disappearing ink, to make color-change bubbles, and as a pH indicator. It has an inky blue color and readily changes to its colorless form from exposure to air or carbon dioxide from breath.
Thymolphthalein is used in disappearing ink, to make color-change bubbles, and as a pH indicator. It has an inky blue color and readily changes to its colorless form from exposure to air or carbon dioxide from breath.
Thymolphthalein is a phthalein dye used as an acid–base (pH) indicator. Its transition range is around pH 9.3–10.5. Below this pH, it is colorless; above, it is blue.
Thymolphthalein is also known to have use as a laxative and for disappearing ink.
Dissolve 0.04 g thymolphthalein in 50 mL of 95% ethanol. Dilute this solution to 100 mL with distilled water.
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Thymolphthalein RXSOL-60-6605-733 is a phthalein dye used as an acid–base (pH) indicator. Its transition range is around pH 9.3–10.5. Below this pH, it is colorless; above, it is blue.
OTHER PH INDICATOR:
Methyl red is a pH indicator;
it is red in pH under 4.4, yellow in pH over 6.2
4.4 ⇌ 6.2
Bromothymol blue RXSOL-60-6295-125 also known as bromothymol sulfone phthalein and BTB
it is yellow in pH under 6, Blue in pH over 7.6
6 ⇌ 7.6
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