Hexahydrate

Aluminum chloride (AlCl3) is a compound of aluminium and chlorine. The solid has a low melting and boiling point, and is ionicly bonded with significant covalent character. It sublimes at 178 °C. Molten AlCl3 conducts electricity poorly,[1] unlike more ionic halides such as sodium chloride. It exists in the solid state as a six-coordinate layer lattice.

Cobalt(II) chloride is the chemical compound with the formula CoCl2, although the term is used also to refer to the hexahydrate, which is a different chemical compound. CoCl2 is blue, and CoCl2·6H2O is deep rose. Because of this dramatic color change and the ease of the hydration/dehydration reaction, "cobalt chloride" is used as an indicator for water.

Cobalt nitrate is a chemical salt formed from the metal cobalt and the nitrate ion. It is an oxidizer and is soluble in water. It is more commonly found as a hexahydrate, Co(NO3)2·6H2O

Magnesium bromide (MgBr2) is a chemical compound of magnesium and bromine that is white and deliquescent. It is often used as a mild sedative and as an anticonvulsant for treatment of nervous disorders.

Nickel(II) chloride (or just 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 nickelbischofite. A dihydrate is also known.

Nickel(II) chloride (or just 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 nickelbischofite. A dihydrate is also known.