Nickel (II) chloride (nickel chloride) is the chemical compound NiCl2. The anhydrous salt is yellow, but the more familiar hydrate NiCl2·6H2O is green. It is very rarely found in nature as mineral nickel bischofite. Nickel (II) chloride, in various forms, is the most important source of nickel for chemical synthesis. Nickel salts have been shown to be carcinogenic to the lungs and nasal passages, in cases of long-term inhalation exposure. They are also deliquescent, absorbing moisture from the air to form a solution.
Nickel ores are mined for the production of nickel matte and metallic nickel. Nickel chloride is obtained from nickel matte used in the production of metallic nickel. Nickel chloride is also obtained from nickel metal produced from these ores.
It is a source of nickel ion for cell culture and toxicological studies, such as in the blockage of ion channel activity.
It is utilized in electroplating and nickel-plating.
Nickel chloride is used for the preparation of nickel coordination compounds, antiseptic and catalyzer.
It is used as an NH3 absorbant in gas masks.