---
title: Phenolphthalein White
date: 2025-03-05T09:10:02Z
modified: 2026-09-15T04:45:36Z
permalink: "https://allanchem.com/phenolphthalein-white/"
type: page
status: publish
excerpt: ""
wpid: 4379
timestamp: 2026-09-15T04:45:36Z
tags: []
---

##### CAS Number

77-09-8















##### Grade

ACS















##### Packaging

Fiber Drum







































Phenolphthalein is a chemical compound that is often used as an acid-base indicator in titrations, turning from colorless to pink in alkaline solutions. Phenolphthalein is sparingly soluble in water but soluble in alcohol and other organic solvents.
**Chemical Formula:** C20H14O4
**Appearance:** A white or off-white crystalline powder
**Uses:**
**Pharmaceuticals:** Phenolphthalein has been historically used as a laxative in some over-the-counter medications.
**Research and Development:** Used in research and development activities, particularly in fields related to chemistry, biochemistry, and pharmaceutical sciences. It also serves as a versatile tool for studying pH-dependent processes and designing experiments involving acid-base chemistry.
**Analytical Chemistry:** It is used as a pH indicator in buffer solutions and biochemical assays to monitor pH changes during chemical reactions.







































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