Abstract The thermal analysis of CoC2O42H2O, Co (HCOO) 22H2O and Co (CH3COO) 24H2O was carried out with simultaneous TG-DTG-DTA measurements under non- isothermal conditions in air and argon atmospheres. The intermediates and the end products of decomposition were characterised by X-ray diffraction and IR and UV-VIS spectroscopy. The decomposition of the studied compounds occur in several stages. The ...