Potassium sulfide is a chemical compound with the formula K2S. It consists of two potassium (K) ions and one sulfide (S) ion. This compound appears as a yellowish or white solid and is highly soluble in water, forming a strongly alkaline solution. Potassium sulfide is often used in various industrial applications, including the production of other chemicals and in agriculture as a fertilizer. In addition to its industrial uses, potassium sulfide can also be found in some laboratory settings. It is important to handle this compound with care, as it can release toxic hydrogen sulfide gas when it reacts with acids. Proper safety measures should be taken when working with potassium sulfide to avoid health hazards.