【Chemical Name】 9,9-Bis[4-(2-hydroxyethoxy)phenyl]fluorene
【Other Name】 BPEF | Bisphenoxyethanolfluorene | BHEPF | BPHE | 4,4‘-(9-Fluorenylidene)bis(2-phenoxyethanol) | 2,2’-[9H-Fluorene-9,9-diylbis(benzene-4,1-diyloxy)]diethanol | 双膦芬 (Bisphosphine fluorene – Chinese trade name)
【CAS No.】 117344-32-8
【Molecular Formula】 C₂₉H₂₆O₄
【Molecular Weight】 438.51–438.52 g/mol
【Product properties】
| Property | Value |
| :--- | :--- |
| Appearance | White to almost white powder to crystal |
| Purity (GC) | ≥98.0% |
| Purity (HPLC) | ≥98.0% – ≥99.5% (high purity grade) |
| Melting Point | 160.0 – 166.0 °C |
| Boiling Point | 610.7±55.0 °C (predicted) |
| Density | 1.248±0.06 g/cm³ (predicted) |
| Solubility | Insoluble in water; soluble in methanol, acetone, toluene, DMSO |
| pKa | 13.95±0.10 (predicted) |
| Physical State (20°C) | Solid |
【Storage】 Store sealed in a dry, cool, dark place. Recommended temperature: Room temperature (<15°C) or 2–8°C. Avoid moisture and light.
【Packing】 Available in 5g, 25g, 100g, 500g, 1kg, and bulk packaging upon request.
【Application】
- High-refractive-index optical resins – Key monomer for polycarbonates, polyesters, and epoxy resins achieving n<sub>D</sub> = 1.620–1.646 with near-zero birefringence (Δn as low as 0.00007). Used in smartphone lenses, camera lenses, automotive displays, LCD/OLED polarizing films.
- Engineering plastics – Building block for BPA‑free, high‑heat polycarbonates with excellent transparency and mechanical strength.
- UV‑curable coatings & adhesives – Monomer for UV‑curable epoxy acrylate oligomers in optical waveguides, protective films, semiconductor packaging.
- Advanced polymers – Used in fluorene‑based epoxy resins, polyurethanes, polyarylates, polyethers, polyesters with outstanding thermal stability and flame retardancy.
- Dental materials – Dimethacrylate derivative reduces polymerization shrinkage by ~22% vs. Bis‑GMA.
- Optical films – Modifies orientation birefringence in cellulose ester films for photographic and polarizer protection layers.
【Product Specification】
| Item | Specification |
| :--- | :--- |
| Purity (HPLC/GC) | ≥98.0% – ≥99.5% |
| Appearance | White to almost white powder/crystal |
| Melting Point | 160.0–166.0°C |
| Water Solubility | Insoluble |
| MDL Number | MFCD00216628 |
| HS Code | 2906.29.6000 / 29094990 |
| Storage Class | Room temperature, dark place |
| GHS Signal Word | Warning |