Used primarily as a fertilizer in agriculture, especially for crops sensitive to chloride, such as tobacco, fruits, and vegetables. It supplies both potassium and sulfur, essential nutrients for plant growth, improving yield, disease resistance, and fruit quality. Commonly applied in horticulture, greenhouse farming, and high-value crops where balanced nutrition is critical. Also used in some industrial applications, including glass manufacturing and as a flux in metallurgy, though agricultural use dominates.