Ammonium chloride (Latin: Ammonii chloridum; common name: salmiak, NH4Cl) - inorganic chemical compound, salt of hydrochloric acid and ammonia. It occurs naturally as a rare mineral native salmiak.
Ammonium chloride is mainly used as an electrolyte in the dry cells of Leclanché, the most commonly used galvanic cells today. It is also used as an expectorant (component of anise drops), a shampoo component.
The phenomenon of thermal decomposition of ammonium chloride was used to clean up soldering tips and to clean metal surfaces.
Ammonium chloride is the oldest known ammonium salt. It was first obtained in ancient times.
It is used in food products as a preserving and preserving agent.