• Molecular Formula : (NH4)2SO4
• Appearance : White Powder Crystal
• CAS No : 7783-20-2
• HS No : 3102-21-0000
• Country of Origin : China

Ammonium sulfate, also called diammonium sulfate or sulfuric acid diammonium salt, is a white crystalline solid with no smell. It tastes salty. The compound dissolves easily in water but will not dissolve in alcohol or acetone. It readily absorbs water, so if it's exposed to moist air, it will "scab" on the damp surfaces. When ammonium sulfate reacts with alkaline substances, it gives off ammonia gas. Finally, ammonium sulfate is a fertilizer that's sometimes used in making homemade explosives.

Ammonium sulfate is used most commonly as an artificial fertilizer for alkaline soils. When introduced into damp soil, an ammonium ion is released. This creates a small amount of acid, which lowers the pH balance of the soil. Ammonium sulfate can be used in the production of printed circuit boards, and also in flame retardant materials because it lowers the combustion temperature and increases the production of residues or chars.