Description

5,5′-Bi-2-benzofuran-1,1′,3,3′-tetrone (CAS No. 2420-87-3) is a high-purity aromatic dianhydride compound with the molecular formula C₁₆H₆O₆. This specialized chemical, also known by its IUPAC name 5-(1,3-dioxo-2-benzofuran-5-yl)-2-benzofuran-1,3-dione, features a rigid biphenyl core with two reactive anhydride functionalities, making it a valuable building block for advanced polymer synthesis. The compound appears as a fine crystalline powder with excellent thermal stability, suitable for high-performance polyimide and polyamide applications. Available in ≥98% purity by HPLC, this product is rigorously tested for trace metals, moisture content, and residual solvents to meet the stringent requirements of materials science research. Packaged under inert gas in amber glass vials to ensure long-term stability.

Properties

• CAS Number: 2420-87-3
• Complexity: 517
• IUPAC Name: 5-(1,3-dioxoisobenzofuran-5-yl)isobenzofuran-1,3-dione
• InChI: InChI=1S/C16H6O6/c17-13-9-3-1-7(5-11(9)15(19)21-13)8-2-4-10-12(6-8)16(20)22-14(10)18/h1-6H
• InChI Key: WKDNYTOXBCRNPV-UHFFFAOYSA-N
• Exact Mass: 294.01643791
• Molecular Formula: C16H6O6
• Molecular Weight: 294.21
• SMILES: C1=CC2=C(C=C1C3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O
• Topological: 86.7
• Monoisotopic Mass: 294.01643791
• Physical Description: Dry Powder
• Synonyms: 2420-87-3, 3,3′,4,4′-Biphenyltetracarboxylic dianhydride, [5,5′-Biisobenzofuran]-1,1′,3,3′-tetrone, 4,4′-Biphthalic dianhydride, 5,5′-bi-2-benzofuran-1,1′,3,3′-tetrone, SN5KO2N6PC, DTXSID8044886, EINECS 219-342-9, 3,3′,4,4′-biphenyltetracarboxylic anhydride, DTXCID6024886, (5,5′-Biisobenzofuran)-1,1′,3,3′-tetrone, 1,1′-Biphenyl-3,3′,4,4′-tetracarboxylic acid dianhydride, 3,3′,4,4′-Biphenyltetracarboxylic 3,4:3′,4′-dianhydride, J28.182D, 219-342-9, 4,4′-Biphthalic anhydride, [5,5′-Biisobenzofuran]-1,1′,3,3′-tetraone, 3,3,4,4-Biphenyltetracarboxylic Dianhydride, BPDA, 5-(1,3-dioxo-2-benzofuran-5-yl)-2-benzofuran-1,3-dione, 3,3′,4,4′-Biphenyltetracarboxylic acid dianhydride, 3,3′,4,4′-Biphenyltetracarboxylic dianhydride (BPDA), 5,5′-biisobenzofuran-1,1′,3,3′-tetraone, Diphenyl-3,3′,4,4′-tetracarboxylic Dianhydride, UNII-SN5KO2N6PC, MFCD00039140, SCHEMBL169305, 3,4,3′,4′-biphenyltetracarboxylic acid dianhydride, 5-(1,3-dioxoisobenzofuran-5-yl)isobenzofuran-1,3-dione, CHEMBL3185102, Tox21_301695, STK366517, AKOS003242023, CS-W009437, FB62603, HY-W008721, NCGC00256278-01, AC-14433, AS-14497, CAS-2420-87-3, B1326, B4262, NS00027589, ST50907563, 3,3-Biphenyltetracarboxylic dianhydride, H11254, 3,3′,4,4′-biphenyltetracarboxylic acid anhydride, 3,3′,4,4′-Biphenyltetracarboxylic dianhydride, 3,3′,4,4′-Biphenyltetracarboxylic dianhydrideBPDA, 4,4′-Biphthalic Anhydride (purified by sublimation), Q4836253, 3,3′,4,4′-Biphenyltetracarboxylic dianhydride, 97%, 1,1′-Biphenyl-3,3′,4,4′-tetracarboxylic dianhydride, [1,1′-Biphenyl]-3,3′,4,4′-tetracarboxylic 3,4:3′,4′-dianhydride, 5-(1,3-dioxo-1,3-dihydro-2-benzofuran-5-yl)-1,3-dihydro-2-benzofuran-1,3-dione, 3,3 inverted exclamation marka,4,4 inverted exclamation marka-Biphenyltetracarboxylic dianhydride

Application

This bifunctional dianhydride serves as a critical monomer for synthesizing thermally stable polyimides used in flexible printed circuits and aerospace composites. Its rigid structure contributes to high glass transition temperatures in polymers for microelectronic encapsulation. Researchers also employ it as a crosslinking agent for epoxy resins to enhance mechanical properties in high-temperature adhesives.

Safety and Hazards

GHS Hazard Statements

• H315 (71.6%): Causes skin irritation [Warning Skin corrosion/irritation]
• H319 (77%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H335 (71.6%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

Precautionary Statements

• P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501

Hazard Classes and Categories

• Skin Irrit. 2 (71.6%)
• Eye Irrit. 2 (77%)
• STOT SE 3 (71.6%)

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