TAHQ CAS 2770-49-2

Name: TAHQ CAS 2770-49-2
Brand: Aure Chemical
Price: 1.00 USD
Availability: InStock
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Synonyms: 1,4-Phenylene Bis(1,3-dioxo-1,3-dihydroisobenzofuran-5-carboxylate); p-Phenylenebis(trimellitate anhydride); p-Phenylene bis(trimellitate) dianhydride; Bis(1,3-dioxo-1,3-dihydroisobenzofuran-5-carboxylic Acid) 1,4-Phenylene Ester; 5,5'-[p-Phenylenebis(oxycarbonyl)]diphthalic anhydride; 1,4-Phenylene Bis(anhydrotrimellitate)

Shandong Aure Chemical Co., Ltd. is one of the leading suppliers of TAHQ in China and also one of the manufacturers of this product.

We can provide customized requirements in terms of product purity, packaging specifications, and other aspects.

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Product Details

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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)
Abbreviation	TAHQ
CAS Number	2770-49-2
Molecular Formula	C24H10O10
Molecular Weight	458.33 g/mol
Appearance	White to light yellow powder or crystalline solid
Purity	≥99%
Packaging	1 kg / bottle, 20 kg / drum, or customized
Molecular Structure

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.

Packaging, Logistics & Compliance Capabilities

Aure Chemical provides flexible packaging solutions, compliant logistics arrangements, and controlled storage practices to support laboratory-scale, pilot-scale, and commercial-scale global supply.