Product Details

CasNo： 77-09-8

MF： C20H14O4

Appearance： powder

Delivery Time： 15 days

Packing： 25kg/drum

Purity： 98%

Basic Information

Product Description

Product Name：Phenolphthalein

CAS No: 77-09-8

Form: powder

Product Application

Chemical Analysis & Laboratory Reagent:

Acid-Base Indicator:​ One of the most classic and commonly used indicators​ for acid-base titrations, especially suitable for strong base-strong acid or strong base-weak acid titrations (endpoint pH > 7). Ubiquitous in educational and industrial labs.

Visualization Agent:​ Used in thin-layer chromatography (TLC) as a visualizing agent for certain compounds under UV light after treatment.

Education & Demonstration:

"Invisible Ink":​ Used in engaging chemistry demonstrations to illustrate pH changes.

Chemical Magic Shows:​ Popular for vividly demonstrating the concepts of acidity, alkalinity, and chemical color change.

Other Specific Industrial Uses:

Formerly used as an indicator in certain electrolyte solutions.

Serves as a chemical intermediate in the synthesis of some dyes.

(Historical Use) Pharmaceuticals:

Was a primary active ingredient in stimulant laxatives. It has been banned for human medicinal use​ by major regulatory agencies worldwide (e.g., US FDA, EU EMA, China NMPA) due to evidence of potential carcinogenicity​ (IARC Group 2B) and risks of electrolyte imbalance. Its use is now obsolete in medicine.

Packaging

25kg/drum

Storage

Store in a cool, dry, well-ventilated place away from incompatible materials.