Adiabatic Calorimetric Decomposition Studies of 35 Mass% Hydroxylamine Hydrochloride/water

The HH (35 mass% hydroxylamine hydrochloride/water solution) and HH‐ind (stabilized 35 mass% hydroxylamine hydrochloride/water solution for industrial use) decomposition reaction has an onset temperature of ～145°C. The measured gas phase decomposition products are 0.25 mol N₂ and 0.06 mol O₂ per mol of hydroxylamine hydrochloride with small quantities of N₂O and H₂, and a trace amount of NO for a total noncondensable gas production of ～0.39 mol/mol of hydroxylamine hydrochloride. The reaction system is tempered by the evaporation of the solvent (water) and the reaction is drastically catalyzed by stainless and carbon steel.