What is the formula for ammonium sulfide?

The formula for ammonium sulfide is (NH4)2S. It consists of two ammonium ions (NH4+) and one sulfide ion (S2-). It is a colorless to yellowish solid or solution with a strong odor of rotten eggs. It is used in various industrial processes such as in the production of dyes, pigments, and other chemicals. It can be prepared by reacting ammonium hydroxide with hydrogen sulfide gas. It is soluble in water and its aqueous solution can be acidic, basic, or neutral depending on the concentration. The ammonium ion forms weakly acidic solutions, while the sulfide ion forms weakly basic solutions, resulting in the potential for a neutral solution if they are present in equal concentrations.