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Product Code B2081-LT-25g
Price £76 ex. VAT

A fluorinated diamine building block

Used as the intermediate for polyimides preparation in application of solar cells, telecommunication, and capacitors


Specifications | MSDS | Literature and Reviews


2,2-Bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (4-BDAF), CAS number 69563-88-8, has two phenoxyanilines connected by a hexafluoroisopropane. 2,2-Bis[4-(4-aminophenoxy)phenyl]hexafluoropropane is commonly used for the synthesis of polyimides. The steric effect from the trifluoromethyl substituents reduces the intermolecular interaction and their electron withdrawing effect to minimise the electron delocalization of the benzene rings. These properties lead to low dielectric constant (1.51–2.42 at 100 kHz) and low dielectric loss (0.00698), making the polyimides promising materials for telecommunication applications. The high optical transparency of these polyimides is exploited for the substrates in solar cells achieving 16.1% powder conversion efficiency.

The polyetherimides derived from 4-BDAF are also used in capacitive energy storage application with discharge density at 3.6 J/cm3 and charge-discharge efficiency at 96.5%.

Multiple functional groups

Multiple functional groups

For facile synthesis

Fluorinated building block

Fluorinated diamine building block

For polyimides, COFs, and solar cells

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High purity 69563-88-8

High purity

>99% High purity

General Information


CAS Number 69563-88-8
Chemical Formula C27H20F6N2O2
Full Name 2,2-Bis[4-(4-aminophenoxy)phenyl]hexafluoropropane
Molecular Weight 518.345 g/mol
Synonyms 4,4′-(Hexafluoroisopropylidene)bis(p-phenyleneoxy)dianiline, 4′,4′′′-(Hexafluoroisopropylidene)bis(4-phenoxyaniline)
Classification / Family Diamine building block, Fluorinated building block, Solar cells, Telecommunications, Capacitors

Chemical Structure


2,2-Bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (4-BDAF) chemical structure, CAS 69563-88-8.
2,2-Bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (4-BDAF) chemical structure, CAS 69563-88-8

Product Details


Purity >99%
Melting Point Tm = 159 °C – 163 °C
Appearance White to pale yellow to light brown powder/crystal

MSDS Documentation


2,2-Bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (4-BDAF)2,2-Bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (4-BDAF) MSDS Sheet

Literature and Reviews


  1. Biomimetic electrodes for flexible organic solar cells with efficiencies over 16%, T.-Y. Qu et al., Adv. Optical Mater., 8, 2000669(2020); DOI: 10.1002/adom.202000669.
  2. Construction of all-organic low dielectric polyimide hybrids via synergistic effect between covalent organic framework and cross-linking structure, W. Zhao et al., Nano Material Science, 2023, DOI: 10.1016/j.nanoms.2023.02.002.
  3. Dielectric polymers for high-temperature capacitive energy storage, H. Li et al., Chem. Soc. Rev., 50, 6369-6400(2021); DOI: 10.1039/D0CS00765J.
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