Description

3,4′-Oxydiphthalic Anhydride (CAS No. 50662-95-8) is a high-purity aromatic dianhydride with the molecular formula C₁₆H₆O₇. This compound, also known by its IUPAC name 4-[(1,3-dioxo-2-benzofuran-5-yl)oxy]-2-benzofuran-1,3-dione, is a critical building block in the synthesis of advanced polyimides and other high-performance polymers. Its unique oxy-bridged diphthalic structure imparts exceptional thermal stability, mechanical strength, and chemical resistance to the resulting materials.

Our product is rigorously tested to ensure >98% purity (HPLC) and is supplied as a fine, off-white to pale yellow crystalline powder. It is packaged under inert atmosphere to prevent moisture absorption and degradation. Ideal for research and industrial applications requiring precise stoichiometry in polymer synthesis.

Key applications include: polyimide resins for aerospace composites, high-temperature adhesives, dielectric films for flexible electronics, and gas separation membranes. The compound’s dual anhydride functionality enables controlled crosslinking and copolymerization with various diamines.

Properties

• CAS Number: 50662-95-8
• Complexity: 583
• IUPAC Name: 4-(1,3-dioxoisobenzofuran-5-yl)oxyisobenzofuran-1,3-dione
• InChI: InChI=1S/C16H6O7/c17-13-8-5-4-7(6-10(8)15(19)22-13)21-11-3-1-2-9-12(11)16(20)23-14(9)18/h1-6H
• InChI Key: OPVHOFITDJSMOD-UHFFFAOYSA-N
• Exact Mass: 310.01135253
• Molecular Formula: C16H6O7
• Molecular Weight: 310.21
• SMILES: C1=CC2=C(C(=C1)OC3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O
• Topological: 96
• Monoisotopic Mass: 310.01135253
• Synonyms: 3,4′-Oxydiphthalic Anhydride, 805-890-1, 50662-95-8, 4-((1,3-Dioxo-1,3-dihydroisobenzofuran-5-yl)oxy)isobenzofuran-1,3-dione, 4-[(1,3-Dihydro-1,3-dioxo-5-isobenzofuranyl)oxy]-1,3-isobenzofurandione, MFCD22460472, 4-[(1,3-dioxo-2-benzofuran-5-yl)oxy]-2-benzofuran-1,3-dione, 2,3,3′,4′-Tetracarboxydiphenyl oxide dianhydride (|A-ODPA), 5-[(1,3-dioxo-1,3-dihydro-2-benzofuran-4-yl)oxy]-1,3-dihydro-2-benzofuran-1,3-dione, 3,4′-OxydiphthalicAnhydride, 2,3,3′,4′-DIPHENYL ETHER TETRACARBOXYLIC ACID DIANHYDRIDE, 3,4’oxydiphthalic anhydride, SCHEMBL263838, DTXSID50561838, OPVHOFITDJSMOD-UHFFFAOYSA-N, AC7785, 3,4?-OXYDIPHTHALIC ANHYDRIDE, AKOS016003976, FO62673, AS-72795, SY038100, DB-348980, O0384, 3,4 inverted exclamation mark -Oxydiphthalic Anhydride, 4-(1,3-dioxoisobenzofuran-5-yl)oxyisobenzofuran-1,3-dione, 4-[(1,3-Dioxo-1,3-dihydro-2-benzofuran-5-yl)oxy]-2-benzofuran-1,3-dione

Application

3,4′-Oxydiphthalic Anhydride serves as a key monomer for synthesizing thermally stable polyimides used in microelectronics packaging. The material’s high glass transition temperature makes it suitable for flexible printed circuit boards and insulating layers in semiconductor devices. Researchers utilize this dianhydride to develop advanced polymer membranes with selective gas permeability for CO₂ capture applications. Its rigid aromatic structure contributes to exceptional dimensional stability in composite materials for aerospace components.

Safety and Hazards

GHS Hazard Statements

• H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]
• H318 (100%): Causes serious eye damage [Danger Serious eye damage/eye irritation]

Precautionary Statements

• P264, P264+P265, P280, P302+P352, P305+P354+P338, P317, P321, P332+P317, and P362+P364

Hazard Classes and Categories

• Skin Irrit. 2 (100%)
• Eye Dam. 1 (100%)

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