Description

1,3-Isobenzofurandione, 5,5′-sulfonylbis- (CAS No. 2540-99-0) is a high-purity aromatic sulfonyl-bridged dianhydride compound with the molecular formula C₁₆H₆O₈S. This specialized chemical serves as a critical building block in advanced polymer synthesis, particularly for high-performance polyimides and polyamide-imides. The compound features two reactive phthalic anhydride groups connected by a sulfonyl linker, enabling the formation of thermally stable polymers with exceptional mechanical properties. With an IUPAC name of 5-[(1,3-dioxo-2-benzofuran-5-yl)sulfonyl]-2-benzofuran-1,3-dione, this white to off-white crystalline powder offers excellent solubility in polar aprotic solvents while maintaining high thermal stability (>300°C). Our product undergoes rigorous QC testing including HPLC purity analysis, melting point verification, and moisture content determination to ensure batch-to-batch consistency for research and industrial applications.

Properties

• CAS Number: 2540-99-0
• Complexity: 705
• IUPAC Name: 5-(1,3-dioxoisobenzofuran-5-yl)sulfonylisobenzofuran-1,3-dione
• InChI: InChI=1S/C16H6O8S/c17-13-9-3-1-7(5-11(9)15(19)23-13)25(21,22)8-2-4-10-12(6-8)16(20)24-14(10)18/h1-6H
• InChI Key: ZHBXLZQQVCDGPA-UHFFFAOYSA-N
• Exact Mass: 357.97833832
• Molecular Formula: C16H6O8S
• Molecular Weight: 358.3
• SMILES: C1=CC2=C(C=C1S(=O)(=O)C3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O
• Topological: 129
• Monoisotopic Mass: 357.97833832
• Synonyms: 2540-99-0, 5,5′-Sulfonylbis(isobenzofuran-1,3-dione), 3,3′,4,4′-Diphenylsulfonetetracarboxylic dianhydride, 1,3-Isobenzofurandione, 5,5′-sulfonylbis-, 4,4′-Sulfonyldiphthalic dianhydride, MFCD00039145, 5-[(1,3-dioxo-2-benzofuran-5-yl)sulfonyl]-2-benzofuran-1,3-dione, 4,4′-Sulfonyldiphthalic Anhydride, Bis-(3-phthalyl anhydride) sulfone, NSC689416, 5-[(1,3-dioxo-1,3-dihydro-2-benzofuran-5-yl)sulfonyl]-1,3-dihydro-2-benzofuran-1,3-dione, 3,3,4,4-diphenylsulfonetetracarboxylicdianhydride (DSDA), 3,3′,4,4′-Diphenylsulfonetetracarboxylic Dianhydride (purified by sublimation), DSDA, 5,5′-Sulfonylbis-1,3-isobenzofurandione, EC 807-101-6, SCHEMBL209746, CHEMBL2007526, DTXSID0073299, 4,4′-Diphthalic anhydride sulfone, STK499021, AKOS000428031, DS-6809, NSC-689416, NCI60_032195, SY054994, 4,4′ -Sulfonyldiphthalic acid dianhydride, DB-046697, 5,5′-sulfonylbis(2-benzofuran-1,3-dione), D2309, D4554, NS00003882, ST50979295, H11631, 3,3′,4,4′-Diphenyl sulfone tetracarboxylic anhydride, 3,3′,4,4′- Diphenylsulfone tetracarboxylic dianhydride, 5-(1,3-dioxoisobenzofuran-5-yl)sulfonylisobenzofuran-1,3-dione, 5-[(1,3-dioxoisobenzofuran-5-yl)sulfonyl]isobenzofuran-1,3-dione, 3,3 inverted exclamation mark ,4,4 inverted exclamation mark -Diphenylsulfonetetracarboxylic Dianhydride

Application

This sulfonyl-bridged dianhydride is primarily employed as a monomer for synthesizing high-temperature resistant polyimides used in aerospace composites and microelectronics encapsulation. The sulfonyl linkage imparts enhanced solubility to resulting polymers while maintaining thermal stability, making it valuable for flexible printed circuit boards and optoelectronic materials. Researchers also utilize it to develop gas separation membranes and proton-conducting materials for fuel cell applications.

Safety and Hazards

GHS Hazard Statements

• H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

Precautionary Statements

• P264+P265, P280, P305+P351+P338, and P337+P317

Hazard Classes and Categories

• Eye Irrit. 2 (100%)

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