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
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.
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Items
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Specifications
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Characteristics
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White powder
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Identification
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A: Positive
B: Positive |
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Appearance of Solution
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The Solution Is Clear And Not More Intensely Coloured Than Reference Solution Y7
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Melting Point
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It melts at about 260℃
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Related Substances
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0.5% max
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Heavy Metals
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10ppm max
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Acidity or Alkalinity
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Complies
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Chlorides
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100ppm max
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Sulphates
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200ppm max
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Loss on Drying
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0.5% max
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Sulphated ash
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0.1% max
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Assay
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98.0-101.0%(C20H14O4)
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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.
25kg/drum
