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Product Code B2071-10g
Price $95 ex. VAT

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A fluorinated diamine building block

As the intermediate for the synthesis of polyimides in application of high-performance polymers and batteries


1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene (6FAPB) is an aminophenyl ether bearing two trifluoromethyl groups at the meta-positions to the amines. 1,4-Bis(4-amino-2-trifluoromethylphenoxy)benzene is a precursor for synthesizing polyimides which possess high thermal resistant (5% thermal weight loss at 525 °C), extraordinary mechanical properties (tensile strength > 60 MPa, Young's modulus > 4 GPa) and outstanding insulation properties (breakdown strength > 358 kV/mm). Therefore, these polyimides can be used as low energy consumption insulation materials. The steric effect from the trifluoromethyl groups reduces the intermolecular aggregation, resulting low refractive index and high transparency to the polyimides.

The polyimides derived from 6FAPB can be used as interlayers for current collectors in high energy lithium-ion batteries. This type of current collectors improves 16–26% specific energy and can self-extinguish fires under short circuits.

Multiple functional groups

Multiple functional groups

For facile synthesis

Fluorinated building block

Fluorinated diamine building block

for polyimides, COFs, and batteries

Worldwide shipping for 94525-05-0

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High purity 94525-05-0

High purity

>99% High purity

General Information

CAS Number 94525-05-0
Chemical Formula C20H14F6N2O2
Full Name 1,4-Bis(4-amino-2-trifluoromethylphenoxy)benzene
Molecular Weight 428.33 g/mol
Synonyms 4,4'-(1,4-Phenylenebis(oxy))bis(3-(trifluoromethyl)aniline), 4,4'-[1,4-Phenylenebis(oxy)]bis[3-(trifluoromethyl]benzenamine
Classification / Family Diamine building block, Fluorinated building block, Polyimides, Batteries, High performance polymers

Chemical Structure

1,4-Bis(4-amino-2-trifluoromethylphenoxy)benzene (6FAPB) chemical structure, CAS 94525-05-0.
1,4-Bis(4-amino-2-trifluoromethylphenoxy)benzene (6FAPB) chemical structure, CAS 94525-05-0

Product Details

Purity >99%
Melting Point Tm = 132 °C – 136 °C
Appearance White to off-white powder/crystal

MSDS Documentation

1,4-Bis(4-amino-2-trifluoromethylphenoxy)benzene (6FAPB)1,4-Bis(4-amino-2-trifluoromethylphenoxy)benzene (6FAPB) MSDS Sheet

Literature and Reviews

  1. Comparison of properties of colorless and transparent polyimide films using various diamine monomers, H. Jeon et al., Rev. Adv. Mater. Sci., 61, 394-404(2022); DOI: 10.1515/rams-2022-0044.
  2. Preparation and characterization of semi-alicyclic polyimides containing trifluoromethyl group for optoelectronic application, M. Zhang et al., Polymers, 12, 1532(2020); DOI: 10.3390/polym12071532.
  3. Recyclability and self-healing of dynamic cross-linked polyimide with mechanical/electrical damage, B. Wan et al., Energy Environ. Mater., 6, e12427(2023); DOI: 10.1002/eem2.12427.
  4. Synthesis and properties of soluble cross-linkable fluorinated co-polyimides, H. Yao et al., React. Funct. Polym., 82, 58-65(2014); DOI: 10.1016/j.reactfunctpolym.2014.05.011.
  5. Ultralight and fire-extinguishing current collectors for high-energy and high-safety lithium-ion batteries, Y. Ye et al., Nat. Energy, 5, 786-793(2020); DOI: 10.1038/s41560-020-00702-8.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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