Property | Value |
Synonyms | Perfluoro(2,2-dimethyl-1,3-dioxole); PDD; 2,2-Bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole |
Molecular Formula | C₅F₈O₂ |
Molecular Weight | 244.04 g/mol |
Appearance | Colorless clear liquid |
Boiling Point | 43 °C (at 760 mmHg) |
Density | 1.72 g/cm³ (at 25 °C) |
Refractive Index | 1.307 (at 20 °C) |
Flash Point | ≈ -15 °C (estimated) |
Description of 4,5-Difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole
4,5-Difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole (CAS: 37697-64-6), commonly known as Perfluoro(2,2-dimethyl-1,3-dioxole) or PDD, is a highly fluorinated cyclic vinyl ether monomer. PDD is a critical comonomer in the production of amorphous perfluoropolymers. Its incorporation results in transparent, low-refractive-index materials with outstanding optical clarity, low dielectric constant, and superior chemical resistance.
Application of 4,5-Difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole
Comonomer for Amorphous Perfluoropolymers.
Optical Fibers and Claddings. Used in high-performance optical fiber cladding materials, enabling low-loss transmission and excellent transparency for telecom and sensing applications.
Anti-Reflective and Protective Coatings. Incorporated into thin-film coatings with superior anti-reflective properties, chemical resistance, and durability for lenses, displays, and precision optics.
Gas Separation and Pervaporation Membranes. Enables membranes with high permeability, selectivity, and stability in harsh environments for gas separation and solvent recovery.
Semiconductor and Electronics Components. Applied in dielectric coatings, protective layers, and materials requiring ultra-low dielectric constant and high purity in advanced electronics.
Storage of 4,5-Difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole
It should be kept in a tightly sealed, pressure-resistant container under inert gas (nitrogen/argon) in a cool, well-ventilated area. Keep away from heat, sparks, open flames, and direct sunlight. Highly volatile and flammable; avoid moisture and oxidizing agents. An inhibitor may be present to prevent polymerization.
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