Description

P,P'-[p-Phenylenebis(Azo)]Bisphenol CAS NO 21811-64-3 is a specialized azo-bridged phenolic compound characterized by its distinct molecular structure. This chemical is valued for its role as a high-performance intermediate and functional additive in advanced material synthesis. It is primarily sought by manufacturers in the polymer, specialty chemical, and advanced coating industries who require precise molecular building blocks to impart specific thermal, optical, or mechanical properties to their final products.

Application

• As a key monomer or cross-linking agent in the synthesis of high-performance polyimides, polyesters, and other engineering plastics.
• Utilized in the production of specialized azo dyes and pigments for applications requiring enhanced lightfastness and thermal stability.
• Acts as a functional additive in advanced epoxy resin systems and coatings to modify curing characteristics and final material properties.
• Employed as an intermediate in liquid crystal polymers (LCPs) and other high-temperature resistant materials.
• Serves in research and development for novel photoresists and electronic materials.
• Potential use as a stabilizer or antioxidant precursor in specialty polymer formulations.

Basic Information

Product Name	P,P'-[p-Phenylenebis(Azo)]Bisphenol
CAS No.	21811-64-3
Molecular Formula	C24H18N4O2
Molecular Weight	394.43 g/mol
Synonyms	4,4'-(1,4-Phenylenebis(azo))diphenol; 4,4'-Dihydroxyazobenzene-4,4'-diyl; p,p'-Dihydroxyazobenzene; Phenol, 4,4'-(1,4-phenylenedi-1,2-diazenediyl)bis-; Azodianil; Azo-bridged bisphenol; 1,4-Bis(4-hydroxyphenylazo)benzene
EINECS	Contact for details

Quality Control

Our P,P'-[p-Phenylenebis(Azo)]Bisphenol is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency and meets high-purity standards suitable for industrial and R&D applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Orange to red crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
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.