What are some natural acid/base indicators?

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Dr. Jayasimha

Teaching professional with 20 years of experience in teaching Chemistry

Litmus,Alizarin ,Cochineal,Anthocyanin,Logwood,Curcumin( turmeric yellow),Esculin .
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Many flowers,fruits,vegtables are natural indicators. One such example is rose anthocyanins.
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Many flowers, fruits and vegetables contain chemical substances that change color in solutions of different pH. acid or base natural indicator, such as hibiscus, turmeric, red cabbage, and some other kinds of plants. Many indicators have been extracted from plants.
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