4,4'-Difluorodiphenyl sulfone is an important fluorinated aromatic compound widely used as a monomer in high-performance polymer synthesis, particularly for polyethersulfone (PES) and polyarylethersulfone (PAES) resins. It exhibits excellent thermal stability with a melting point of 98-100°C (lit.) and boiling point of 367.9±27.0°C at 760 mmHg. The compound has a density of 1.365 g/cm³ and refractive index of 1.496. As a key pharmaceutical intermediate, it should be stored in airtight containers below 30°C, protected from moisture. Safety precautions include wearing gloves/eye protection due to potential skin/eye irritation (GHS Category 2).
