What Is Phenolphthalein?

Phenolphthalein Definition: Phenolphthalein is an organic compound often used as an pH indicator.

Phenolphthalein turns pink in pH greater than 8.3 and colorless in acidic solutions.

The chemical formula for phenolphthalein is C₂₀H₁₄O₄.

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Helmenstine, Anne Marie, Ph.D. "Phenolphthalein Definition." ThoughtCo, Nov. 29, 2014, thoughtco.com/definition-of-phenolphthalein-605503. Helmenstine, Anne Marie, Ph.D. (2014, November 29). Phenolphthalein Definition. Retrieved from https://www.thoughtco.com/definition-of-phenolphthalein-605503 Helmenstine, Anne Marie, Ph.D. "Phenolphthalein Definition." ThoughtCo. https://www.thoughtco.com/definition-of-phenolphthalein-605503 (accessed May 25, 2018).