Phenolphthalein

Phenolphthalein /ˌfiːnɒlfˈθeɪliːn/ 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 in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.

单词	Prulet
释义	Prulet 英语百科 Phenolphthalein Phenolphthalein /ˌfiːnɒlfˈθeɪliːn/ 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 in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.
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Prulet

Phenolphthalein