Ammonium sulfate is a white crystalline solid with a bitter taste and no odor, and it has strong hygroscopicity. Its CAS number is 7783-20-2, molecular formula is (NH4)2SO4, molecular weight is 132.14, and density is 1.77 g/cm³. Ammonium sulfate is readily soluble in water, and its aqueous solution exhibits weak acidity and has certain corrosive properties. Ammonium sulfate has high thermal stability and does not easily decompose, but at high temperatures it decomposes to release toxic gases. Ammonium sulfate has wide-ranging applications and holds significant value in the chemical, metallurgical, fuel, and agricultural industries.