2,2'-Diamino diphenyl sulfide is an aromatic diamino-thioether in which amino groups are located ortho to the sulfur bridge on both benzene rings. The compound is air-stable, freely soluble in dichloromethane, chloroform, ethyl acetate and acetone, and practically insoluble in water.
Key physicochemical data:
Melting point: 109–111 °C
Predicted boiling point: 359 °C at 760 mmHg
Predicted density: 1.22 g cm⁻³
Predicted log P (octanol/water): 2.3
Flash point: > 200 °C
Typical uses:
Central precursor for bis-benzothiazine-1,1-dioxide COX-2 inhibitors after oxidation of the sulfur to sulfone.
Building block for bis-aryl-sulfone pharmaceutical impurities and agro-chemical standards.
Internal standard for GC-MS quantitative analysis of diamino-thioether residues.
Quality specification (commercial grade):
Purity (HPLC): ≥98 %
Water content (KF): ≤0.3 %
Residue on ignition: ≤0.1 %
Heavy metals: ≤20 ppm
Hazard statement:
Causes skin and eye irritation (R36/37/38). Harmful if swallowed (R22). Avoid inhalation of dust; use gloves, goggles and adequate ventilation. Store in a cool, dry place away from oxidants. SDS available on request.
