Cobalt chloride is an inorganic compound of cobalt and chloride, with the formula CoCl2. It is usually supplied as the hexahydrate CoCl2Â·6H2O, which is one of the most commonly used cobalt compounds in the laboratory.[1The most common use for Cobalt Chloride is in a type of Desiccant named Blue Indicating Silica Gel. This product is in bead form and will turn from Blue to Pink when full absorbed. This is one of the most widely used indicating desiccant products and poses health risks and environmental issues.