Description

4',4'''-Azobis[[1,1'-Biphenyl]-4-Carboxylic] Acid is a high-purity, bifunctional azo compound that serves as a critical initiator and building block in advanced polymer synthesis. Its value lies in its ability to generate stable free radicals upon thermal decomposition, enabling precise control over polymerization processes. This product is essential for R&D chemists and production engineers in the polymer, specialty chemical, and advanced materials industries seeking to develop novel copolymers and functionalized materials.

Application

• Polymerization Initiator: Used as a thermal free-radical initiator for the synthesis of styrenic polymers, acrylics, and other vinyl polymers.
• Macromolecular Building Block: Incorporated into polymer backbones to create azo-functionalized polymers for specialty applications.
• Cross-linking Agent: Facilitates the formation of cross-linked polymer networks in coatings, adhesives, and composite materials.
• Surface Modification: Employed to graft polymer chains onto various substrates for enhanced surface properties.
• Advanced Material Research: Serves as a key intermediate in the development of stimuli-responsive (e.g., photo- or thermo-responsive) polymers and smart materials.
• Dye & Pigment Intermediate: Acts as a precursor in the synthesis of certain azo dyes and high-performance pigments.

Basic Information

Product Name	4',4'''-Azobis[[1,1'-Biphenyl]-4-Carboxylic] Acid
CAS No.	148-85-6
Molecular Formula	C26H18N2O4
Molecular Weight	422.43 g/mol
Synonyms	4,4'-Azobis(biphenyl-4-carboxylic acid); 4,4'-Azodianiline-4,4'-dicarboxylic acid; 4,4'-Carboxyazobenzene; 4,4'-Azobis(4-carboxybiphenyl); Azobis(biphenyl-4,4'-dicarboxylic acid); p,p'-Azobis(biphenyl-4-carboxylic acid); Azo-bis-biphenyl-4,4'-dicarboxylic acid
EINECS	205-727-1

Quality Control

Our 4',4'''-Azobis[[1,1'-Biphenyl]-4-Carboxylic] Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing key parameters such as assay, melting point, and impurity profile is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). This compound is light-sensitive and easily oxidized; for long-term storage, consider keeping the container under an inert atmosphere such as nitrogen or argon to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to orange crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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