Explore Top-Quality DSDA with Aure Chemical
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 |
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| Abbreviation | DSDA |
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| CAS Number | 2540-99-0 |
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| Molecular Formula | C16H6O8S |
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| Molecular Weight | 358.28 g/mol |
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| Appearance | Off-white to white 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
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.
