Question

What is phenolphthalein ?​

Answer 1

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$\sf\purple{➛}$a colourless crystalline solid (pink in alkaline solution) used as an acid–base indicator and medicinally as a laxative.

Answer 2

Explanation:

Phenolphthalein is a chemical compound with the formula C₂₀H₁₄O₄ and is often written as "HIn" or "phph" in shorthand notation. Phenolphthalein is often used as an indicator