Tags: Chemical Compound, Chemical Substance.
Cobalt(II) chloride is an inorganic compound of cobalt and chlorine with the formula CoCl2. It is usually supplied as the hexahydrate CoCl2·6H2O which is one of the most commonly used cobalt compounds in the laboratory. The hexahydrate is deep purple in color whereas the anhydrous form is sky blue. A blend would be mauve. Because of the ease of the hydration/dehydration reaction and the resulting color change cobalt chloride is used as an indicator for water in desiccants.
