3,3,4,4-diphenylsulfonetetracarboxylicdianhydride DSDA CAS 2540-99-0

Name: 3,3,4,4-diphenylsulfonetetracarboxylicdianhydride DSDA CAS 2540-99-0
Brand: Aure Chemical
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Synonyms: 4,4'-Sulfonyldiphthalic dianhydride; 5,5'-Sulfonylbis(isobenzofuran-1,3-dione); 4,4'-Sulfonyldiphthalic anhydride; Bis-(3-phthalyl anhydride) sulfone; 1,3-Isobenzofurandione, 5,5'-sulfonylbis-; 3,3',4,4'-Diphenyl sulfone tetracarboxylic anhydride

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

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Product Details

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3,3',4,4'-Diphenylsulfonetetracarboxylic dianhydride (DSDA, CAS 2540-99-0) is a sulfone-containing aromatic dianhydride widely used in the synthesis of high-performance polyimides and copolyimides. The rigid aromatic framework combined with a polar sulfone linkage (–SO₂–) imparts excellent thermal stability, mechanical strength, chemical resistance, flame retardancy, and dimensional stability, making DSDA particularly suitable for harsh, safety-critical, and high-temperature environments.

Basic Information of DSDA

Product Name	3,3',4,4'-Diphenylsulfonetetracarboxylic dianhydride
Abbreviation	DSDA
CAS Number	2540-99-0
Molecular Formula	C16H6O8S
Molecular Weight	358.28 g/mol
Appearance	Off-white to white solid
Purity	≥99%
Packaging	1 kg / bottle, 20 kg / drum, or customized
Molecular Structure

Key Properties

Aromatic sulfone structure provides high thermal stability and inherent flame retardancy
Excellent oxidative and chemical resistance in aggressive and oxidative environments
High rigidity contributes to dimensional stability and elevated glass transition temperature (Tg)
Suitable for high-strength polyimides and copolyimides with enhanced safety and durability
Effective for introducing sulfone functionality to tailor mechanical, thermal, and dielectric properties

Key Applications of DSDA

Electronics & Microelectronics
DSDA-based polyimides are widely used in flexible printed circuits (FPCs), semiconductor passivation layers, insulating dielectrics, and electronic encapsulation materials. The sulfone structure enhances thermal endurance, flame resistance, and long-term reliability under demanding electronic operating conditions.
Learn more about polyimide dianhydrides for electronics & microelectronics
Aerospace & High-Temperature Insulation
DSDA is incorporated into lightweight composites, thermal insulation systems, and protective components for aerospace and defense, where resistance to extreme temperatures, oxidative stress, and flame exposure is critical.
Explore aerospace and high-temperature insulation applications
Automotive & Power Electronics
Applied in under-the-hood components, electrical insulation parts, and protective coatings for automotive and power electronics systems operating at elevated temperatures.
Energy Storage & Separation Technologies
DSDA is widely used in polyimide-based gas separation membranes and energy-related functional polymer systems, including CO₂/CH₄, O₂/N₂, and hydrogen separation. The sulfone linkage enhances polarity, chemical resistance, and long-term stability under aggressive operating conditions, making DSDA suitable for advanced energy storage and separation applications.
Learn more about polyimide dianhydrides for energy storage and separation
Specialty Coatings & Adhesives
Employed in high-temperature, flame-retardant coatings and structural adhesives for bonding metals, ceramics, and composite materials.

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.