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Product Code B2031-100g
Price £115 ex. VAT

An asymmetrical diamine building block

As intermediate for the preparation of polyimides in application of transparent substrates, organic porous materials, and pervaporation membranes


Specifications | MSDS | Literature and Reviews


3,4'-Oxydianiline (3,4'-ODA), CAS number 2657-87-6, is a phenyl ether derivative capped with two amines at para- and meta-position on either end. 3,4'-Oxydianiline is typically used for synthesizing polyimides with multi-functionalities. Due to the meta-substituted amine hindering the intermolecular packing, the polyimides are transparent. Therefore, they are applied as substrates in displays. The high thermal stability (210 °C) allows these polyimides to be used as substrates for sintering integrated devices.

3,4'-ODA is also used in synthesizing organic porous materials with BET surface area up to 351 m2/g. The polyetherimide membranes obtained from this diamine building block show effectiveness on pervaporation for water-isopropanol separation.

General Information


CAS Number 2657-87-6
Chemical Formula C12H12N2O
Full Name 3-(4-Aminophenoxy)aniline
Molecular Weight 200.24 g/mol
Synonyms 3,4′-DAPE, 3,4′-diaminodiphenyl ether, 3,4′-oxydiphenylamine, 3-(4-aminophenoxy)aniline
Classification / Family Diamine building block, Transparent substrate, Polyimides, Pervaporation membranes

Chemical Structure


3,4'-Oxydianiline (3,4'-ODA) chemical structure, CAS 2657-87-6
3,4'-Oxydianiline (3,4'-ODA) chemical structure, CAS 2657-87-6

Product Details


Purity >99%
Melting Point Tm = 61 °C – 67 °C
Appearance Pale yellow to reddish yellow powder/crystal

MSDS Documentation


3,4'-Oxydianiline (3,4'-ODA)3,4'-Oxydianiline (3,4'-ODA) 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., 62, 394-404(2022); DOI: 10.1515/rams-2022-0044.
  2. Fabrication of gold-doped crystalline-silicon nanomembrane-based wearable temperature sensor, K. Kang et al., STAR protocols, 4(1), 101925(2023); DOI: 10.1016/j.xpro.2022.101925.
  3. Solid-state thermal rectification of bilayers by asymmetric elastic modulus, J. Lee et al., Mater. Horiz., 10, 1431-1439(2023), DOI: 10.1039/d2mh01550a.
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