Cobalt Nitrate Hexahydrate

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The hexahydrate is better described as hexaaquacobalt(II) nitrate, [Co(OH2)6][NO3]2, as it consists of discrete [Co(OH2)6]2+ and [NO3]− ions. Above 55 °C, the hexahydrate converts to the trihydrate and at higher temperatures to the monohydrate. Cobalt Nitrate Hexahydrate uses in manufacture of cobalt pigments and invisible inks, decorating stoneware and porcelain, preparation of catalysts, production of vitamin B12 supplements. Formula CoH12N2O12 Molar mass 291.031 g/mol CAS Number 10026-22-9 Density 1.88 g/cm3 Purity/Grade ≥98% (ACS Reagent) Appearence Red crystalline Melting point/freezing point 55°C (131°F) – lit. Water solubility Soluble pH 4.0 at 100 g/l at 20°C (68°F)””


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