... (Pb)content,% ≤0.005--Water insolubles,% ≤0.01--Note: When ammonium sulphate is used in agriculture,it is not necessary ... cost.4.Usage:1>Mainly use in fertilizer, its advantage is less absorb moisture compared to other fertilizer.2>use in industry ,pharmaceuticals,textiles, ... ,Beer making,Chemical agent Storage battery making, making compound fertilizer 98% Ammonium Sulphate (NH4)2SO4 with Nitrogen 21%