2,2′-Dimethyl-[1,1′-biphenyl]-4,4′-Diamine (M-Tolidine)

Basic Information of M-Tolidine

Product Name	2,2'-Dimethyl-[1,1'-biphenyl]-4,4'-diamine
Abbreviation	M-Tolidine
CAS Number	84-67-3
Product Type	Methyl-substituted biphenyl aromatic diamine monomer
Molecular Formula	C14H16N2
Molecular Weight	212.29 g/mol
Appearance	White to off-white solid
Purity	≥ 99.5%; batch data should be confirmed when quality documentation is available
Main Application	Specialty aromatic polymer, organic intermediate and advanced material synthesis
Package	1 kg/bottle, 20 kg/drum, or customized packaging
Documents	SDS, TDS and available product information upon request
Storage	Keep sealed, dry, and away from moisture
Molecular Structure

Key Features in Polymer Design

• Methyl-substituted biphenyl diamine structure, relevant to specialty polyimide diamine monomers and aromatic polymer building blocks.

• Rigid biphenyl backbone may support molecular stiffness and structural control depending on the paired co-monomer and polymer architecture.

• Methyl substituents may influence molecular packing, polarity and processability in selected aromatic polymer systems.

• Dual amine functionality makes M-Tolidine suitable for evaluation in polymer chain extension, condensation reactions and specialty organic intermediate development.

• Final material properties depend on monomer purity, co-monomer selection, solvent system, reaction conditions and polymer processing method.

Pairing M-Tolidine with Dianhydride Monomers

In polyimide synthesis, M-Tolidine may be evaluated with selected polyimide dianhydride monomers to design aromatic, low-polarity or specialty PI systems. Rigid aromatic dianhydrides such as BPDA CAS 2420-87-3 or BTDA CAS 2421-28-5 may support thermal resistance and dimensional stability.

Fluorinated dianhydrides such as 6FDA CAS 1107-00-2 may be considered when dielectric behavior, free volume or moisture-related properties are part of the target polymer design, while ether-containing dianhydrides such as ODPA CAS 1823-59-2 may help adjust processability and film-forming behavior.

Application Context of M-Tolidine in Specialty Material Systems

M-Tolidine is typically used as a structural aromatic diamine intermediate rather than a finished application material. It is commonly discussed in specialty polymer, organic electronic material, dye intermediate and framework material research contexts where biphenyl structure and diamine reactivity can influence material design.

• Electronics and semiconductor polyimide applications – low-polarity, insulation and electronic material research contexts.

• Specialty functional polymer materials – aromatic diamine selection for advanced polymer and organic material research.

• Dyes and pigment intermediates – M-Tolidine can be considered as an aromatic diamine intermediate in selected organic synthesis routes.

• Framework material research – biphenyl diamine structures may be evaluated in COF, MOF or separation-related material studies depending on the synthetic route.

• Processable polymer system development – monomer structure and substituent effects in specialty polymer formulation studies.

Related Polyimide Monomer Supply Guides

For a broader technical overview of both diamine and dianhydride monomer families, please review Polyimide Monomers: Diamines and Dianhydrides.

Related Polyimide Monomers and Specialty Intermediates

• BPDA CAS 2420-87-3 – rigid aromatic dianhydride for low-CTE and high-temperature PI films.

• BTDA CAS 2421-28-5 – benzophenone-type aromatic dianhydride for thermally stable PI resins and coatings.

• BAPB CAS 13080-85-8 – ether-containing biphenyl aromatic diamine for processable and heat-resistant polyimide systems.

SDS, TDS and Technical Documentation

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