Description

4,4′-Carbonyldiphthalic Anhydride (CAS No. 2421-28-5) is a high-purity aromatic dianhydride with the molecular formula C₁₇H₆O₇. This compound, also known as 3,3′,4,4′-Benzophenonetetracarboxylic Dianhydride, is a critical precursor in the synthesis of advanced polyimides and other high-performance polymers. Its rigid, symmetrical structure contributes to exceptional thermal stability, mechanical strength, and chemical resistance in polymeric materials. Available in fine crystalline powder form, our product is meticulously purified to ensure consistency for demanding research and industrial applications. Suitable for use in optoelectronics, aerospace composites, and microelectronics encapsulation due to its excellent dielectric properties and high glass transition temperatures.

Properties

• CAS Number: 2421-28-5
• Complexity: 597
• IUPAC Name: 5-(1,3-dioxoisobenzofuran-5-carbonyl)isobenzofuran-1,3-dione
• InChI: InChI=1S/C17H6O7/c18-13(7-1-3-9-11(5-7)16(21)23-14(9)19)8-2-4-10-12(6-8)17(22)24-15(10)20/h1-6H
• InChI Key: VQVIHDPBMFABCQ-UHFFFAOYSA-N
• Exact Mass: 322.01135253
• Molecular Formula: C17H6O7
• Molecular Weight: 322.22
• SMILES: C1=CC2=C(C=C1C(=O)C3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O
• Topological: 104
• Monoisotopic Mass: 322.01135253
• Physical Description: Other Solid
• Synonyms: 2421-28-5, 3,3′,4,4′-Benzophenonetetracarboxylic dianhydride, 1,3-Isobenzofurandione, 5,5′-carbonylbis-, Benzophenonetetracarboxylic dianhydride, 4,4′-Carbonyldiphthalic anhydride, Benzophenonetetracarboxylic acid dianhydride, 4,4′-Carbonylbis(phthalic anhydride), 4,4′-Diphthalic anhydride ketone, Phthalic anhydride, 4,4′-carbonyldi-, NSC 78480, 3,3′,4,4′-Benzophenonetetracarboxylic acid dianhydride, 3,3′,4,4′-Tetracarboxybenzophenone dianhydride, DTXSID3029233, Y61GVA8097, EINECS 219-348-1, NSC-78480, DTXCID409233, EC 219-348-1, Benzophenone-3,3′:4,4′-tetracarboxylic dianhydride, 5,5′-CARBONYLBIS(1,3-ISOBENZOFURANDIONE), 3,3′,4,4′-BENZOPHENONETETRACARBOXYLIC ANHYDRIDE, 3,4,3′,4′-BENZOPHENONETETRACARBOXYLIC DIANHYDRIDE, 3,4,3′,4′-BENZOPHENONETETRACARBOXYLIC ACID ANHYDRIDE, BENZOPHENONE-3,3′,4,4′-TETRACARBOXYLIC ACID ANHYDRIDE, Phthalic anhydride, 4,4′-carbonyldi-(8CI), Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride, 5-(1,3-dioxo-2-benzofuran-5-carbonyl)-2-benzofuran-1,3-dione, Benzophenonetetracarboxylic anhydride, Benzophenonetetracarboxylic acid anhydride, 5,5′-CARBONYLBIS(ISOBENZOFURAN-1,3-DIONE), 5,5′-carbonylbis(2-benzofuran-1,3-dione), 3,3′,4,4′-BENZOPHENONE TETRACARBOXYLIC DIANHYDRIDE, 3,3′,4,4′-Benzophenonetetracraboxylic Dianhydride, 3,3′,4,4′-Benzophenonetetracarboxylic dianhydride(BTDA), Benzophenone-3,3 inverted exclamation marka,4,4 inverted exclamation marka-tetracarboxylic dianhydride, 3,3,4,4-Benzophenonetetracarboxylic Dianhydride, UNII-Y61GVA8097, 5-[(1,3-dioxoisobenzofuran-5-yl)carbonyl]isobenzofuran-1,3-dione, MFCD00005923, BTDA, 1, 5,5′-carbonylbis-, SCHEMBL169521, CHEMBL3183537, 5-(1,3-dioxoisobenzofuran-5-carbonyl)isobenzofuran-1,3-dione, Phthalic anhydride,4′-carbonyldi-, NSC78480, Tox21_200475, BBL000526, SBB058597, STK256923, AKOS003239423, benzophenone tetracarboxylic dianhydride, CS-W009885, FB62713, HY-W009169, NCGC00248646-01, NCGC00258029-01, AC-14698, CAS-2421-28-5, benzophenone tetracarboxylic acid dianhydride, 3,4,4′-Tetracarboxybenzophenone dianhydride, B0948, B4260, NS00004883, ST50308178, 3,4,4′-Benzophenonetetracarboxylic dianhydride, D71198, Benzophenone-3,3′,4,4′-tetracarboxylicdianhydride, 3,4,4′-Benzophenonetetracarboxylic acid dianhydride, Q27294296, Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride, 98%, 3,3′,4,4′-Benzophenonetetracarboxylic Dianhydride (purified by sublimation), 5,5-Carbonylbis(1,3-isobenzofurandione);4,4-Carbonyldiphthalic anhydride, 5-(1,3-dioxo-1,3-dihydro-2-benzofuran-5-carbonyl)-1,3-dihydro-2-benzofuran-1,3-dione, Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride, purified by sublimation, 96%

Application

4,4′-Carbonyldiphthalic anhydride is primarily used as a monomer for synthesizing thermally stable polyimides in aerospace and electronics industries. Its high reactivity with diamines enables production of polymers with exceptional mechanical strength and resistance to extreme temperatures. The compound is also employed in advanced coatings and adhesives where thermal oxidative stability is critical.

Safety and Hazards

GHS Hazard Statements

• Not Classified

Precautionary Statements

• P261, P264+P265, P271, P280, P304+P340, P305+P351+P338, P319, P337+P317, P403+P233, P405, and P501

Hazard Classes and Categories

• Eye Irrit. 2 (100%)
• STOT SE 3 (100%)

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