Description

4,4'-Diamino-2,2'-Dimethylbibenzyl CAS NO 54628-21-6 is a high-purity aromatic diamine derivative, serving as a critical building block in advanced organic synthesis. Its bifunctional amino groups and rigid, substituted biphenyl core make it a valuable precursor for creating high-performance polymers and specialty chemicals. This compound is essential for manufacturers and R&D facilities in the polymer, pharmaceutical intermediate, and advanced materials sectors seeking to develop products with enhanced thermal and mechanical properties.

Application

• Polymer Synthesis: A key monomer for the production of high-performance polyimides, polyamides, and polybenzimidazoles, contributing to thermal stability and mechanical strength.
• Pharmaceutical Intermediates: Used in the synthesis of complex active pharmaceutical ingredients (APIs) and other bioactive molecules.
• Epoxy Curing Agents & Hardeners: Functions as a curing agent for epoxy resins, influencing crosslink density and final material properties.
• Liquid Crystal Polymers (LCPs): Serves as a diamine component in the manufacture of LCPs for electronics and high-temperature applications.
• Dye and Pigment Intermediates: Utilized in the synthesis of specialized dyes, pigments, and optical brighteners.
• Research & Development: A versatile reagent in academic and industrial R&D for exploring new materials and synthetic pathways.

Basic Information

Product Name	4,4'-Diamino-2,2'-Dimethylbibenzyl
CAS No.	54628-21-6
Molecular Formula	C16H20N2
Molecular Weight	240.35 g/mol
Synonyms	2,2'-Dimethylbenzidine; 2,2'-Dimethyl-4,4'-diaminobiphenyl; 4,4'-Diamino-2,2'-dimethylbiphenyl; 2,2'-Dimethyl-[1,1'-biphenyl]-4,4'-diamine; o-Tolidine (Note: o-Tolidine typically refers to 3,3'-Dimethylbenzidine, but this is the 2,2'-isomer); Bianisidine (2,2'-dimethyl derivative); Biphenyl-4,4'-diamine, 2,2'-dimethyl-
EINECS	Contact for details

Quality Control

Our 4,4'-Diamino-2,2'-Dimethylbibenzyl is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for industrial and research applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm

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