Phenolphthalein CAS 77-09-8

Phenolphthalein

Name	Phenolphthalein
Synonyms	2-[Bis(4-hydroxyphenyl)methyl]benzoic acid; 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone; 3,3-Bis(4-hydroxyphenyl)phthalide
Molecular Structure
Molecular Formula	C20H14O4
Molecular Weight	318.33
CAS Registry Number	77-09-8
EC Number	201-004-7

Uses:

1. Pharmaceutical field

Antidiarrheal medication:

Pharmaceutical intermediates: used for synthesizing other drugs or pharmaceutical raw materials.

2. Chemical analysis

Acid base indicator: Color changing range pH 8.2 (colorless) to 10.0 (red).

Laboratory reagents: used as standard solutions or indicators for scientific research experiments.

3. Industrial applications

Organic synthesis: used for synthesizing plastics.

Dyes and pigments: used as indicator dyes for coloring glass and ceramics.