Dichloride

Calcium chloride, CaCl₂, is a common salt. It behaves as a typical ionic halide, and is solid at room temperature. It has several common applications such as brine for refrigeration plants, ice and dust control on roads, and in concrete.

Magnesium chloride is the name for the chemical compounds with the formulas MgCl₂ and its various hydrates MgCl₂(H₂O)_x. These salts are typical ionic halides, being highly soluble in water. The hydrated magnesium chloride can be extracted from brine or sea water.

Tin(II) chloride (stannous chloride) is a white crystalline solid with the formula SnCl2. It forms a stable dihydrate, but aqueous solutions tend to undergo hydrolysis, particularly if hot. SnCl2 is widely used as a reducing agent (in acid solution), and in electrolytic baths for tin-plating.

Zinc chloride is the name of chemical compound with the formula ZnCl₂ and its hydrates. Zinc chlorides, of which nine crystalline forms are known, are colorless or white and highly soluble in water.