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Description. Cobalt(II) chloride (CoCl 2) is the most common cobalt compound found in laboratories. The dramatic color change of blue-purple Cobalt(II) chloride to a rose color when hydrated makes CoCl 2 an excellent indicator for water in dessicants.
3) 2 6H 2 O is a red crystalline compound with a melting point of 56 C; soluble in water, ethanol, propanone, and in organic solvents; slightly soluble in aq. ammonia. It is a raw material for the preparation of cobalt pigments and hair dyes.It is used in vitamin preparations.he major uses of cobalt is preparing metal alloys. Cobalt-60 with a half-life of 5.3 years is a gamma ray source when used in radiotherapy and sterilization. It is used as a catalyst in the petroleum production and chemical synthesis. C obalt-molybdate catalyst is active in desulfurization of petroleum.