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Product Code B2091-LT-10g
Price £76 ex. VAT

A fluorinated phenyl ether diamine building block

The intermediate for polyimides synthesis in application of gas separation membranes, photonics, high performance polymers, and flexible displays


Specifications | MSDS | Literature and Reviews


2,2'-Bis(trifluoromethyl)-4,4'-diaminodiphenyl ether (6FODA), CAS number 344-48-9, is a fluorinated diamine building block. 6FODA has an aminophenyl ether core substituted by two trifluoromethyl groups at 2,2'-positions. 2,2'-Bis(trifluoromethyl)-4,4'-diaminodiphenyl ether is usually engaged in the preparation of polyimides. These two trifluoromethyl groups hinder the π-π interaction of the benzene rings, reducing the light absorption of the polyimides. This high transparency polyimides are suitable for manufacturing flexible OLED displays. The refractive index of the polyimides can be controlled by the amount of 6FODA used in the synthesis (refractive index accuracy of ±4 × 10−4).

The casted membranes from the polyimides have good selective gas permeabilities (ideal selectivity α up to 188.43 CO2/CH4). The fabrics made from this polyimide fibres have low thermal conductivity (0.03 W/m⋅K), good flame retardancy, as well as excellent chemical and UV resistance which are ideal for aviation, military, and other special protections.

Multiple functional groups

Multiple functional groups

For facile synthesis

Fluorinated building block

Fluorinated diamine building block

For photonics, COFs, and polyamides

Worldwide shipping for 344-48-9

Worldwide shipping

Quick and reliable shipping

High purity 344-48-9

High purity

>99% High purity

General Information


CAS Number 344-48-9
Chemical Formula C14H10F6N2O
Full Name 2,2'-Bis(trifluoromethyl)-4,4'-diaminodiphenyl ether
Molecular Weight 336.23 g/mol
Synonyms 4,4'-Oxybis[3-(trifluoromethyl)aniline], Bis(4-amino-2-trifluoromethylphenyl) ether
Classification / Family Diamine building block, Fluorinated building block, Polyimides, Membranes, Photonics

Chemical Structure


2,2'-Bis(trifluoromethyl)-4,4'-diaminodiphenyl ether (6FODA) chemical structure, CAS 344-48-9.
2,2'-Bis(trifluoromethyl)-4,4'-diaminodiphenyl ether (6FODA) chemical structure, CAS 344-48-9

Product Details


Purity >99%
Melting Point Tm = 127 °C
Appearance White to off-white powder/crystal

MSDS Documentation


2,2'-Bis(trifluoromethyl)-4,4'-diaminodiphenyl ether (6FODA)2,2'-Bis(trifluoromethyl)-4,4'-diaminodiphenyl ether (6FODA) MSDS Sheet

Literature and Reviews


  1. A rigid and planar aza-based ternary anhydride for the preparation of cross-linked polyimide membrane displaying high CO2/CH4 separation performance, X. Zhang et al., Polymers, 14, 389(2022); DOI: 10.3390/polym14030389.
  2. Copolyimides for gradient-index optics, A. Rosenberg et al., Opt. Mater. Express, 12(10), 4133-4146(2022); DOI: 10.1364/OME.460831.
  3. High performance soluble polyimides from ladder-type fluorinated dianhydride with polymorphism, F. Li et al., Polymers, 10, 546(2018); DOI: 10.3390/polym10050546.
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