1. Product Overview and Basic Properties Ammonium sulfate is a widely used inorganic ammonium-based compound with the chemical formula (NH₄)₂SO₄. It contains approximately 21% nitrogen (N) and 24% sulfur (S), making it a conventional fertilizer capable of supplying two essential plant nutrients simultaneously. At room temperature, ammonium sulfate appears as white to slightly tinted crystals or granules. It is highly soluble in water, forms a mildly acidic aqueous solution, a