ammonium alum

例句：

1. 1. This ammonium alum is used in the production of fertilizers.
   这种氨铝用于生产肥料。
2. 2. The ammonium alum was found to have antibacterial properties.
   这种氨铝被发现具有抗菌性质。
3. 3. The ammonium alum was used as a catalyst in the reaction.
   这种氨铝用作反应的催化剂。