Cobalt chloride (CAS 7646-79-9)

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Manganese chloride tetrahydrate (CAS 13446-34-9)

Cobalt(II) chloride is an inorganic compound of cobalt and chlorine, with the formula CoCl2. It is a red crystalline solid.

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.

Niche uses of cobalt chloride include its role in organic synthesis and electroplating objects with cobalt metal.

Cobalt chloride has been classified as a substance of very high concern by the European Chemicals Agency as it is a suspected carcinogen.