Hydrazo-carbonates are complex compounds and products of the reactions between solutions of metal ion and solutions of hydrazido-carbonic
acid. The decomposition of Mg(N2H3COO)2. 2H2O, Ca(N2H3COO)2·H2O and Zn(N2H3COO)2 in inert atmosphere were studied. By classical thermoanalytical methods and data on the composition of the intermediates
and final products the mechanisms of the thermal decomposition could not be resolved therefore also evolved gas analysis was
used (EGA). The first step of thermal decomposition of Ca and Mg hydrazidocarbonates is dehydration. With the heating the
decomposition of the hydrazido-carbonates proceeds under evolution of the ammonia, carbon monoxide and/or nitrogen and carbon
dioxide giving as the intermediates for calcium and magnesium compounds the corresponding carbonates oxides as the final products.
The zinc compound decomposes to the oxide, ZnO but also zinc cyanamide was detected during to the thermal treatment.