1,2,4,5-Cyclohexanetetracarboxylic dianhydride (HPMDA, CAS 2754-41-8) is an alicyclic dianhydride monomer supplied at >99% purity as a white to off-white powder or crystal. Its structure is built around a cyclohexane ring carrying two carboxylic anhydride groups on opposite sides, giving succinic anhydride ends that react readily.
Reacting HPMDA with amines yields polyimides, while reaction with alcohols gives polyesters. Because the core is non-aromatic, photochromic polyimides made from it have a local excited state and show a much stronger photo-switching contrast than fully aromatic analogues. HPMDA-derived polyimides also reach a high proton conductivity of 0.2 ± 0.01 S/cm at 298 K and 95% related humidity, and share the chemical and thermal resistance typical of polyimides.
When the dianhydride is hydrolysed into four carboxylic acids, it can serve as a four-branched core for polyesters combining functions such as biodegradability, bioimaging and photoactivity. It also acts as a cyclohexane ligand for cross-linked COF and MOF networks.
- Synthesis of photochromic polyimides with high photo-switching contrast.
- Preparation of proton-conducting polyimide membranes.
- Production of polyimides for optical fibre claddings and microelectronic substrates.
- Synthesis of four-branched polyesters for biodegradable, bioimaging and photoactive materials.
- Use as a cyclohexane ligand in cross-linked COF and MOF networks.
| Brand | Ossila |
|---|---|
| CAS number | 2754-41-8 |
| Molecular formula | C10H8O6 |
| Purity | >99% |
| Category | — |
| Pack sizes | 5 g, 10 g, 25 g |
| Physical form | White to off-white powder/crystal |
| Storage | — |
- Product code: B2041
- Full Name: 1,2,4,5-Cyclohexanetetracarboxylic dianhydride
- Molecular Weight: 224.17 g/mol
- Melting Point: 240 °C
- Classification / Family: Dianhydride building block, Ionic conducting membranes, Polyimides, Polyesters
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