CoCl27H2O

Cobalt(II) chloride heptahydrate, commonly referred to as CoCl2·7H2O, is a chemical compound consisting of cobalt in the +2 oxidation state, chlorine, and seven water molecules. It appears as a blue crystalline solid and is highly soluble in water. The compound is often used in the synthesis of other cobalt compounds and as a catalyst in various chemical reactions. CoCl2·7H2O is also used in the production of pigments and dyes, as well as in the treatment of certain medical conditions. Its chemical formula is CoCl2·7H2O, with a molar mass of approximately 237.99 g/mol. The compound is typically prepared by dissolving cobalt(II) oxide or cobalt(II) carbonate in hydrochloric acid, followed by crystallization. It is important to handle CoCl2·7H2O with care, as it can be toxic if ingested or inhaled. Proper safety measures, such as wearing protective clothing and using personal protective equipment, should be taken when working with this compound.