4,4'-(Hexafluoroisopropylidene) diphthalic anhydride (6FDA) CAS 1107-00-2

Synonyms: 4,4'-(Hexafluoroisopropylidene)bis(phthalic anhydride); 2,2-Bis(3,4-dicarboxyphenyl)-1,1,1,3,3,3-hexafluoropropane dianhydride; Hexafluorodianhydride; Hexafluoroisopropylidene diphthalic anhydride; 1,3-Isobenzofurandione, 5,5'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]bis-; 5,5'-(1,1,1,3,3,3-Hexafluoropropane-2,2-diyl)bis(2-benzofuran-1,3-dione)

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Product Details

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4,4'-(Hexafluoroisopropylidene)diphthalic anhydride (6FDA), CAS 1107-00-2, is a fluorinated dianhydride monomer widely used in the synthesis of high-performance polyimides and polyamides, valued for imparting properties like high thermal stability (glass transition >300°C), mechanical strength, low dielectric constants, transparency, and gas selectivity.

Basic Information of 6FDA

Product Name	4,4'-(Hexafluoroisopropylidene) diphthalic anhydride
Abbreviation	6FDA
CAS Number	1107-00-2
Molecular Formula	C19H6F6O6
Molecular Weight	444.24 g/mol
Appearance	White powder
Purity	≥99.9%
Metal Ion	1ppm Max.for one single metal ions
Package	1kg/bottle, 20kg/drum, or customized
Molecular formula

Key Properties

Fluorine groups introduce high free volume, lowering dielectric constant and water absorption
Good transparency / less color generation in derived polyimides due to suppressed charge transfer interactions
Reasonable thermal stability and rigidity from aromatic dianhydride backbone
Balanced mechanical properties and electrical insulation in polymers
Good processability of polymer with this dianhydride (soluble precursors)

Key Applications of 6FDA

Gas Separation Membranes: Essential for creating polyimide-based membranes, including mixed-matrix and hollow fiber types, with high selectivity for CO₂/CH₄ (up to 45) and H₂/CH₄, approaching performance limits; used in natural gas processing and olefin/paraffin separation.

Electronics and Telecommunications: Produces polyimides with low dielectric constants (e.g., 2.33) for low-signal-loss materials in electronic devices and telecom applications; also serves as substrates for wearable devices.

Solar Cells: Enhances encapsulation in Si-based solar cells, improving power conversion efficiency (from ~14.7% to 15.6%) through better interface and material integration.

Aerospace and Insulation: Forms multilayer insulation materials for protection against space dust, cosmic rays, and debris; used in thermoplastic fluorinated polyimide resins.

Other Polymer Synthesis: Involved in polyamide production from terphenylenes for gas separation and as an intermediate in pharmaceutical and chemical synthesis.

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