Potassium sulfate is a chemical compound with the formula K2SO4. It consists of two potassium ions and one sulfate ion, making it a source of both potassium and sulfur for plants. This white, crystalline salt is commonly used as a fertilizer in agriculture to promote healthy plant growth. In addition to its agricultural uses, potassium sulfate is also utilized in various industrial applications, such as in the production of glass and as a food additive. It is valued for its ability to provide essential nutrients without adding chloride, which can be harmful to some crops.