TAHQ CAS 2770-49-2

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.

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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) or TAHQ (CAS 2770-49-2), is primarily used as a monomer in the synthesis of high-performance polyimides and poly(ester imide)s, offering low water absorption, low coefficient of thermal expansion (CTE), excellent dielectric properties, thermal stability, and mechanical strength.

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 to crystal
Purity	≥99%
Package	1kg/bottle, 20kg/drum, or customized
Molecular formula

Key Properties

Monomer for high-temperature "polyimide and copolyimide" resins
Colorless polyimide (CPI) / transparent insulating films for display electronics / flexible devices
High performance insulating materials for microelectronics, aerospace, and advanced electronics
Dielectric and barrier films demanding thermal, chemical, and mechanical stability
Research & development building block in novel polymer systems

Key Applications of TAHQ

Electronics and High-Frequency Circuits: Employed in flexible printed circuits (FPCs), high-frequency circuit boards for 5G technology, insulating coatings, connectors, and dielectric materials due to its low dielectric loss and moisture resistance.

Display Technologies: Utilized in colorless polyimide (CPI) films for flexible displays, providing transparency, flexibility, and high thermal resistance.

Aerospace and Automotive: Incorporated into heat-resistant components, under-the-hood parts, and structural materials for extreme environments, benefiting from its dimensional stability and chemical resistance.

Other Industrial Uses: Applied in polymer processing like injection molding and extrusion, as well as in chemical storage systems and oil exploration equipment for its durability and corrosion resistance.

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