... in metallurgy, medicine, leather, wood preservative, textile, plating, ferment, fertilizer.Standard (GB535-1995) Index Fine Grade Appearance white crystal without ... ventilated area.Away from the fire, heat source. Avoid combining ammonium sulfate with acid substance and alkali when stored.Storage areas shall ... content. It easily decompose poisonous smoke when heated N21% Fertilizer ammonium sulphate