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