Product name:4,4-Diamino Diphenyl Sulfone Appearance White crystal or powder purity:99.5% min Cas:80-08-8 Melting point:175.0-181.0 Loss on drying :0.3% max. Usage:Material for polysulfone amide and other polymers, anti-leprosy drug Package: 25 kgs net iron/fibre drum Capacity: 800 MT/Year