TAHQ

Basic Information of TAHQ

Product Name	1,4-Phenylene bis(1,3-dioxo-1,3-dihydroisobenzofuran-5-carboxylate)
Synonym	p-Phenylenebis(trimellitate anhydride)
Abbreviation	TAHQ
CAS Number	2770-49-2
Product Type	Ester-containing aromatic dianhydride monomer
Molecular Formula	C24H10O10
Molecular Weight	458.33 g/mol
Appearance	White to light yellow powder or crystalline solid
Purity	≥ 99%; batch data should be confirmed when quality documentation is available
Main Application	Electronic-grade, optical, low-CTE and high-performance polyimide 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 Polyimide Design

• Ester-containing aromatic dianhydride structure, relevant to specialty polyimide dianhydride monomers and poly(ester imide) material design.

• Para-linked phenylene structure may support dimensional stability and low-CTE polymer design depending on the paired diamine and polymer architecture.

• Ester linkages and aromatic anhydride functionality may help balance rigidity, processability and thermal performance in selected polyimide systems.

• TAHQ can be considered in electronics and microelectronics polyimide applications where insulation, dielectric behavior and dimensional reliability are important.

• Final material properties depend on dianhydride purity, diamine selection, solvent system, imidization conditions and polymer processing method.

Pairing TAHQ with Diamine Monomers

In polyimide synthesis, TAHQ may be evaluated with selected polyimide diamine monomers supply portfolio to design electronic-grade, optical, low-CTE and specialty PI systems. Fluorinated diamines such as TFMB / TFDB CAS 341-58-2 may be considered when optical, dielectric or moisture-related properties are part of the target polymer design.

Ether-containing diamines such as BAPP CAS 13080-86-9 or TPE-Q CAS 3491-12-1 may help adjust processability and film-forming behavior, while rigid aromatic diamines may be selected when dimensional stability and thermal resistance are more important.

Application Context of TAHQ in Polyimide Systems

TAHQ is typically used as a structural dianhydride monomer rather than a finished application material. It is commonly discussed in electronic-grade, optical, low-CTE, high-temperature and specialty polyimide material development, where para-phenylene rigidity and ester-containing dianhydride structure can influence polymer performance.

• Electronics and microelectronics polyimide applications – insulation, dielectric behavior and dimensionally stable polymer material design.

• Optical and transparent polyimide systems – monomer selection for optical clarity, reduced coloration and film-related polymer design.

• Aerospace and high-temperature insulation applications – thermally stable and mechanically reliable polymer environments.

• Specialty functional polyimide materials – ester-containing dianhydride selection for advanced polymer research and formulation design.

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

• 6FDA CAS 1107-00-2 – fluorinated dianhydride often considered in transparent and low-dielectric PI systems.

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

• TFMB / TFDB CAS 341-58-2 – fluorinated diamine for transparent, low-dielectric and high-performance PI systems.

SDS, TDS and Technical Documentation

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