Granular Ammonium Sulphate Steel Grade Country of Origin China Specification N 20.5% min S 23.5% min Moisture 1% max Free acid 0.3% max Size 2-4.85mm >90% Color White/off-white (Color can be customized) Packing in 25KG, 50KG(Max 27MT per container) in1250KG (Max 25MT per container) Mark :as customer request available