Study on the thermal decomposition of chromium(III) nitrate nonahydrate (CNN)

The stoichiometry of the thermal decomposition stages of CNN in the temperature range 20-500 °C was studied using TG, DTG and DTA, together with the chemical analysis of gaseous products formed during this process (EGA). The solid intermediates and final decomposition products of CNN, prepared by isothermal heating at desired temperatures, were characterized and identified by IR spectrometry, as well as by standard and indirect chemical analysis. On the basis of the results obtained, a probable mechanism for the overall decomposition of CNN in the above temperature range is proposed.