Ammonium sulfate is a chemical compound with the formula (NH4)2SO4. It is a white, crystalline salt that is widely used in various industrial and agricultural applications. Here are some key points about ammonium sulfate:

1. Chemical Composition: Ammonium sulfate consists of ammonium ions (NH4+) and sulfate ions (SO4^2-).
2. Common Uses:
   • Fertilizer: Ammonium sulfate is a common nitrogen-based fertilizer. It provides a source of both nitrogen and sulfur for plant growth. It is particularly useful for crops that require acidic soil conditions.
   • Industrial Applications: It is used in various industrial processes, such as water treatment, flame retardants, and in the manufacturing of textiles and dyes.
   • Laboratory Reagent: In laboratories, ammonium sulfate is used for various purposes, including protein purification and crystallization.
   • Yeast Nutrient: In brewing, it can serve as a yeast nutrient and pH adjuster during fermentation.
3. Safety Considerations: Ammonium sulfate is generally considered safe when used appropriately in its intended applications. However, inhalation of its dust can be irritating to the respiratory system, and ingestion should be avoided. Proper safety measures should be followed when handling this compound.

Ammonium sulfate is a versatile substance with a range of applications, from agriculture to industrial processes and laboratory work. Its dual provision of nitrogen and sulfur makes it valuable in the realm of fertilizers, particularly for crops with specific soil pH requirements.