Bis(4-methacryloylthiophenyl) sulfide is a sulfur-rich dimethacrylate in which two 4-mercaptophenyl units are linked by a central thio-ether bridge and terminated with polymerisable methacryloyl groups. The compound is readily soluble in toluene, chloroform and THF, sparingly soluble in ethanol and practically insoluble in water. It undergoes rapid free-radical polymerisation to give highly cross-linked networks with high refractive index and excellent optical transparency. Commercial lots are supplied at ≥98 % purity and should be stored at 2–8 °C under nitrogen to minimise premature thermal initiation.
Key Physicochemical Data:
Melting point: 64 °C
Predicted boiling point: 528 °C / 760 mmHg
Density: 1.30 g cm⁻³ (20 °C)
Flash point: 220 °C
Log P (octanol/water): 6.8 (predicted)
Refractive index: 1.652 (predicted)
Typical Uses:
High-index optical monomer for visible/near-IR wave-guide coatings, LED encapsulants and precision microlens arrays.
Cross-linker in thiol-ene or UV-imprint resists providing enhanced plasma etch resistance for micro-electronics.
Rigid, sulfur-rich linker in biomedical bone cements and dental composites exhibiting low polymerisation shrinkage and high radiopacity.
Quality Specification (Commercial Grade):
Purity (HPLC): ≥98 %
Water content (KF): ≤0.3 %
Inhibitor (MEHQ): 100–200 ppm
Residual solvents (GC): ≤0.5 %
Heavy metals: ≤20 ppm
Hazard Statement:
Causes skin and eye irritation (H315 + H319). May cause respiratory irritation if inhaled. Avoid dust formation; use gloves, goggles and adequate ventilation. Store in a cool, dry place away from light, heat and radical initiators. SDS available on request.
