3,3'-Dichloro diphenyl disulfide is an aromatic dichloro-disulfide in which chlorine atoms are located meta to the –S–S– bridge on both benzene rings. The compound is essentially odourless, stable under ambient conditions, freely soluble in hot ethanol, ethyl acetate and dichloromethane, and practically insoluble in water.
Key physicochemical data:
Melting point: 120–122 °C (lit.)
Boiling point: 373 °C / 760 mmHg (predicted)
Density: 1.43 g cm⁻³ (20 °C, solid)
Refractive index: 1.695
Flash point: 168 °C
Vapour pressure: <0.01 mmHg (25 °C)
Log P (octanol/water): 5.1 (predicted)
Typical uses:
Versatile building block for 3,3'-dichloro-diphenyl sulfoxide/sulfone pharmaceutical intermediates and agro-chemicals.
Precursor for meta-substituted diaryl sulfones used as COX-2 inhibitors, herbicide safeners and UV-absorbers.
Model substrate for mechanistic studies on electron-deficient C–S bond activation and cross-coupling reactions.
Quality specification (commercial grade):
Purity (GC): ≥98 %
Water content (KF): ≤0.3 %
Free thiol (as m-Cl-PhSH): ≤0.2 %
Residue on ignition: ≤0.1 %
Heavy metals: ≤20 ppm
Hazard statement:
Causes skin and eye irritation (H315 + H319). May cause respiratory irritation (H335). Avoid inhalation of dust; use gloves, goggles and adequate ventilation. Store in a cool, dry place away from oxidants. SDS available on request .
