Description

4,4'-Bis(3-Methyl-4-Hydroxyphenylazo)-3,3'-Dimethyldiphenyl is a specialized azo dye intermediate known for its distinct chromophoric structure. This compound is valued for its role in synthesizing high-performance pigments and dyes with excellent color fastness and thermal stability. It is primarily utilized by manufacturers in the pigments, advanced polymers, and specialty chemical industries seeking to develop custom colorants for demanding applications.

Application

• High-Performance Pigment Synthesis: A key intermediate for producing azo pigments used in automotive paints, industrial coatings, and plastics requiring superior weatherability and chemical resistance.
• Specialty Dye Manufacturing: Used in the creation of dyes for advanced applications, including liquid crystal displays (LCDs) and optical data storage media.
• Polymer Colorant: Imparts color to engineering plastics and high-temperature polymers where standard colorants may degrade.
• Research & Development: Serves as a building block in organic synthesis for developing novel chromophores and functional materials in academic and industrial R&D labs.
• Ink Formulations: Employed in the production of specialty inks for security printing and other niche applications demanding specific color properties.

Basic Information

Item	Details
Product Name	4,4'-Bis(3-Methyl-4-Hydroxyphenylazo)-3,3'-Dimethyldiphenyl
CAS No.	169797-33-5
Molecular Formula	C28H26N4O2
Molecular Weight	450.54 g/mol
Synonyms	4,4'-Bis(3-methyl-4-hydroxyphenylazo)-3,3'-dimethylbiphenyl; 3,3'-Dimethyl-4,4'-bis[(3-methyl-4-hydroxyphenyl)azo]biphenyl; Azo Dye Intermediate 169797-33-5; Bisazo Dye Intermediate; Disperse Yellow 232 (related class)
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis(3-Methyl-4-Hydroxyphenylazo)-3,3'-Dimethyldiphenyl adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment.

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.

Specification

Item	Specification
Appearance	Orange to red-brown powder or crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0% (Area %)
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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