Phenolphthalein CAS 77-09-8

CAS: 77-09-8
Molecular Formula: C20H14O4
Molecular Weight: 318.32
EINECS: 201-004-7
Storage Period: 1 year

Synonym: 1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-; 1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-; 2,2-bis(p-hydroxyphenyl)phthalide; 3,3-bis(4-Chemicalbookhydroxyphenyl)-1(3h)-isobenzofuranon; alpha-(p-hydroxyphenyl)-alpha-(4-oxo-2,5-cyclohexadien-1-ylidine)-o-toluicacid; alpha-di-(p-hydroxyphenyl)phthalide; alpha-di(p-hydroxyphenyl)phthalide

What is Phenolphthalein CAS 77-09-8?

Phenolphthalein (CAS 77-09-8) is a fine white to light pink crystalline powder widely used as an indicator, intermediate, and additive in industrial applications. It belongs to the class of organic compounds known as phthalein dyes, featuring stable chemical properties and high purity.

As a professional phenolphthalein powder supplier, we provide consistent quality suitable for large-scale industrial use. Our product ensures excellent stability, purity, and color performance across various applications.

Spezifikation

Items	Spezifikationen
Merkmale	Weißes Pulver
Identifikation	A: Positive B: Positive
Aussehen der Lösung	Die Lösung Ist Klar Und Nicht Intensiver Gefärbt Als Referenzlösung Y7
Schmelzpunkt	Es schmilzt bei etwa 260℃
Related Substances	0.5% max
Schwermetalle	10ppm max
Säure oder Alkalinität	Entspricht
Chloride	100ppm max
Sulfate	200ppm max
Verlust auf Trocknung	0.5% max
Sulfatierte Asche	0.1% max
Assay	98.0-101.0%(C20H14O4)

Applications of Phenolphthalein 77-09-8

1. Industrial Chemical Manufacturing

Phenolphthalein 77-09-8 serves as an important intermediate in the synthesis of resins, dyes, and plastics. It is also used in the production of polycarbonate and epoxy materials to improve performance and stability.

2. Coatings and Polymer Production

As a pH-sensitive compound, phenolphthalein can be incorporated into polymer formulations and industrial coatings, contributing to quality control and functional modification during production.

3. Environmental and Process Monitoring

In industrial process monitoring, phenolphthalein powder is applied as a pH indicator to detect endpoint reactions or to monitor the neutralization process in wastewater treatment and chemical manufacturing.

4. Analytical and Process Quality Control

It plays a role in industrial titration and quality control, helping manufacturers maintain precise pH balance during chemical synthesis or product formulation.

Phenolphthalein CAS 77-09-8-application