Phenolphthalein
/ˌfiː.nɒlˈ(f)θa.liːn/
"Phenolphthalein" in a Sentence (2 examples)
Phenolphthalein will turn fuchsia in the presence of a base with a pH of or above 10.0 and will remain colorless in the presence of a solution with a pH of or below 8.2.
Phenolphthalein is an indicator used in acid-base titrations.