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Purple crystal Catalyzer printing and dyeing Cobalt acetate 1.Appearance and properties: the red and purple crystal or crystalline powder of the easy tidal solution. Fig. melting point (c):140 (c) -H2O (c) of the molecular structure of cobalt acetate Relative density (water =1): 1.705 Solubility: soluble in water, ethanol, dilute acid, pyridine. Physical and chemical properties: Melting_point 298 degree C (Dec.) Melting point: 298 C (Dec.) At more than 140 degrees Celsius loss of crystal water. At 15 C, the solubility of 100g in ethanol was 1.49g. Soluble in acetic acid and pyridine, difficult