Granular Ammonium Sulphate Steel Grade Molecular Formula: (NH4)2SO4 CAS No.: 7783-20-2 Molecular Weight: 132.14g/mol Country of Origin ï¼?China Specification Items Standard N 20.5% min S 23.5% min Moisture 1% max Free acid 0.3% max Size 2-5mm >90% Color White/off-white (Color can be customized)