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.

Jan 19, 2022 · Learn about phenolphthalein indicator, including its structure, how to make it, and what colors it turns at various pH values.

Phenolphthalein | C20H14O4 | CID 4764 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity …

Phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution’s pH, phenolphthalein is …

Dec 24, 2018 · The origins of phenolphthalein lie in the German chemical industry during the heyday of artificial dye discovery in the late 19th century.

Phenolphthalein is defined as a compound that was historically used as a laxative but has been deemed obsolete due to its potential toxic effects, including genotoxicity and carcinogenicity, …

Jul 23, 2025 · Phenolphthalein (C20H14O4) is an organic chemical compound often used as an indicator in acid-base titrations. It is slightly soluble in water and usually is dissolved in alcohol …

Dec 1, 2025 · Phenolphthalein is a synthetic organic compound that serves as a common acid-base indicator. It belongs to a class of compounds known as phthalein dyes and functions as a …

Oct 1, 2024 · Phenolphthalein is widely used as an acid-base indicator in analytical chemistry. It exhibits a distinct color change from colorless to raspberry-purple in the pH range of 8.3-10.0, …

Synonym (s): Phenolphthalein, 3,3-Bis (4-hydroxyphenyl)-1 (3H)-isobenzofuranone Empirical Formula (Hill Notation): C20H14O4 CAS Number: 77-09-8 Molecular Weight: 318.32 EC …