Description

4,4'-(Hexafluoroisopropylidene)Diphthalic Acid is a high-performance fluorinated aromatic diacid monomer. This compound matters for its unique combination of thermal stability, chemical resistance, and low dielectric constant imparted by the hexafluoroisopropylidene (-C(CF₃)₂-) bridging group. It is primarily needed by manufacturers in the advanced polymer and specialty chemical sectors seeking to enhance material properties for demanding applications.

Application

• High-Performance Polyimides & Polyamides: A key monomer for synthesizing fluorinated polyimides with exceptional thermal stability, optical clarity, and low moisture absorption for aerospace and electronics.
• Advanced Epoxy Resin Systems: Used as a curing agent or co-monomer to produce epoxy resins with improved chemical resistance and lower dielectric constant for microelectronics encapsulation and composite matrices.
• Specialty Polyesters & Coatings: Serves as a diacid component in the production of fluorinated polyesters for high-durability, weatherable, and low-surface-energy coatings.
• Liquid Crystal Polymers (LCPs): Incorporated into polymer backbones to modify melting points, solubility, and optical properties for display and high-temperature engineering plastic applications.
• Pharmaceutical & Agrochemical Intermediates: Utilized as a sophisticated building block in the synthesis of complex molecules requiring the specific steric and electronic properties of the fluorinated aromatic system.
• Gas Separation Membranes: Contributes to the fabrication of polymeric membranes with high permeability and selectivity for specialized gas separation processes.

Basic Information

Product Name	4,4'-(Hexafluoroisopropylidene)Diphthalic Acid
CAS No.	3016-76-0
Molecular Formula	C19H8F6O8
Molecular Weight	478.26 g/mol
Synonyms	4,4'-(Hexafluoroisopropylidene)bis(phthalic acid); 4,4'-(Hexafluoroisopropylidene)dibenzoic acid; 2,2-Bis[4-(dicarboxyphenyl)]hexafluoropropane; 4,4'-(Perfluoroisopropylidene)diphthalic acid; 4,4'-(1,1,1,3,3,3-Hexafluoro-2-propylidene)bis(phthalic acid); HFDA; 6FDA dianhydride precursor; Bisphenol AF diphthalic acid derivative
EINECS	221-161-6

Quality Control

Our 4,4'-(Hexafluoroisopropylidene)Diphthalic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for high-performance polymer synthesis. Certificates of Analysis (COA) detailing batch-specific results are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and performance in sensitive reactions.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.