Description

Phenolphthalin is a key organic intermediate and analytical reagent, widely recognized for its role in chemical synthesis and as a precursor to the common pH indicator phenolphthalein. Its high purity and consistent quality are critical for ensuring reliable results in sensitive analytical procedures and for the synthesis of downstream specialty chemicals. This compound is essential for manufacturers and R&D laboratories in the pharmaceutical, chemical, and life science sectors.

Application

• Precursor for Phenolphthalein Synthesis: Serves as the primary intermediate in the production of phenolphthalein, a vital pH indicator used in titrations and medical diagnostics.
• Analytical Chemistry Reagent: Employed in specific colorimetric and enzymatic assays for the detection and quantification of various analytes in research and quality control.
• Pharmaceutical Intermediate: Used in the synthesis of certain active pharmaceutical ingredients (APIs) and specialty organic compounds.
• Research & Development: A valuable tool in academic and industrial R&D for studying chemical reactions and developing new analytical methods.
• Chemical Manufacturing: Functions as a building block in the synthesis of dyes, pigments, and other complex organic molecules.

Basic Information

Product Name	Phenolphthalin
CAS No.	81-90-3
Molecular Formula	C₂₀H₁₆O₄
Molecular Weight	320.34 g/mol
Synonyms	3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone; Phenolphthaline; 3,3-Bis(p-hydroxyphenyl)phthalide; 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-; NSC 403319; Phthalide, 3,3-bis(p-hydroxyphenyl)-; Phenolphthalein Reduced Form
EINECS	201-385-7

Quality Control

Our Phenolphthalin is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for research and industrial use. Certificates of Analysis (COA) with detailed specifications are provided for every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.