December 31, 2011
As with most nickel chemicals, the common nickel chloride hexahydrate (NiCl2.6H2O) varies from pale to emerald green in crystal or liquid form. Nickel chloride is strongly hygroscopic and will absorb available water from the air to the point of becoming liquid deliquescence). The anhydrous form is pale yellow in colour. Nickel chloride is also sold in liquid form.