Ammonium chloride, an
inorganic compound with the formula NH
4Cl, is a white crystalline
salt, highly soluble in water. Solutions of
ammonium chloride are mildly acidic.
Sal ammoniac is a name of the natural, mineralogical form of ammonium chloride. The mineral is commonly formed on burning
coal dumps, due to condensation of coal-derived gases. It is also found around some types of volcanic vents. It is mainly used as fertilizer and a flavouring agent in some types of
liquorice. It is the product from the reaction of
hydrochloric acid and
ammonia.