Cobaltic Oxide Monohydrate

Title: Cobaltic Oxide Monohydrate
CAS Registry Number: 12016-80-7
CAS Name: Cobalt hydroxide oxide
Additional Names: cobaltic hydroxide
Molecular Formula: CoHO2
Molecular Weight: 91.94
Percent Composition: Co 64.10%, H 1.10%, O 34.80%
Line Formula: CoO(OH)
Literature References: Alternate formula Co2O3.H2O. Prepn: Glemser in Handbook of Preparative Inorganic Chemistry vol 2, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1965) pp 1520-1521; Schrader, Petzold, Z. Anorg. Allg. Chem. 353, 186 (1967). Existence of anhydrous cobaltic oxide (Co2O3) has not been established: Pagel et al., J. Am. Chem. Soc. 57, 2552 (1935); Nicholls in Comprehensive Inorganic Chemistry vol 3, J. C. Bailar, Jr. et al., Eds. (Pergamon Press, Oxford, 1973) p 1096. See also de Bie, Doyen, Cobalt 15, 3 (1962). Structure: Schrader, Petzold, loc. cit.; Delaplane et al., J. Chem. Phys. 50, 1920 (1969).
Properties: Dark-brown to black powder; hexagonal crystal structure. Converted to Co3O4 on heating to 148-150° in a vacuum. Practically insol in water. Sol in HCl, evolving Cl2; sol in HNO3, H2SO4.
Use: Oxidation catalysts, in separation of cobalt from nickel.
Cobaltic Potassium Nitrite Cobaltic-Cobaltous Oxide Cobaltous Acetate Cobaltous Arsenate Cobaltous Bromide