Discover Aure Chemical's Premium TAHQ Supply
1,4-Phenylene Bis(1,3-dioxo-1,3-dihydroisobenzofuran-5-carboxylate),
also known as p-Phenylenebis(trimellitate anhydride) (TAHQ, CAS 2770-49-2),
is a rigid aromatic dianhydride monomer widely used in the synthesis of
high-performance polyimides and poly(ester imide)s.
Thanks to its para-linked phenylene core and multifunctional anhydride structure,
TAHQ enables polymers with low water absorption, low coefficient of thermal expansion (CTE), excellent dielectric stability,
and outstanding thermal and mechanical performance,
making it well suited for advanced electronic, optical, and structural applications.
Basic Information of TAHQ
| Product Name | 1,4-Phenylene Bis(1,3-dioxo-1,3-dihydroisobenzofuran-5-carboxylate) |
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| Abbreviation | TAHQ |
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| CAS Number | 2770-49-2 |
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| Molecular Formula | C24H10O10 |
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| Molecular Weight | 458.33 g/mol |
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| Appearance | White to light yellow powder or crystalline solid |
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| Purity | ≥99% |
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| Packaging | 1 kg / bottle, 20 kg / drum, or customized |
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| Molecular Structure |  |
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Key Properties
Rigid para-phenylene backbone contributes to low CTE
and excellent dimensional stability
Low moisture uptake improves dielectric reliability
in electronic and high-frequency environments
Excellent thermal stability and chemical resistance in polyimide and poly(ester imide) systems
Supports high glass transition temperatures (Tg)
and long-term heat aging performance
Suitable for advanced polymer design,
copolymerization, and structure–property optimization
Key Applications of TAHQ
Electronics & Microelectronics
TAHQ is widely used in polyimide systems for
flexible printed circuits (FPCs),
high-frequency substrates,
insulating layers,
and advanced packaging materials.
Its low dielectric loss and moisture stability help ensure
signal integrity and reliability in demanding electronic environments.
Learn more about polyimide dianhydrides for electronics & microelectronics
Optical & Colorless Polyimide (CPI) Films
Due to its rigid aromatic structure and controlled optical properties,
TAHQ is suitable for use in CPI and optically optimized polyimide systems
applied in flexible, foldable, and transparent display technologies.
Explore optical and transparent polyimide applications
Aerospace & High-Temperature Structural Materials
TAHQ-based polyimides exhibit excellent thermal endurance,
mechanical strength, and dimensional stability,
making them suitable for aerospace insulation,
lightweight structural components,
and high-temperature automotive parts.
View aerospace and high-temperature insulation applications
Other Industrial Applications
Used in chemical-resistant coatings,
high-performance composite matrices,
and specialty polymer formulations
requiring long-term thermal and environmental durability.
Detailed COA, TDS, and MSDS are available upon request.
Please contact us for technical support,
samples, or commercial inquiries.
