Science and Technology of Energetic Materials

Vol.67, No.5 (2006)

Research paper

Wet decomposition of azide (*in Japanese)
Toshihiko Kitayama, Hajime Hatanaka, Youichi Sano, Toshiyuki Nagaishi, and Hidetsugu Nakamura


The reaction of azide with mixed solution of degradation reagent consisting of sodium nitrite and acetic acid was studied for the wet decomposition treatment of azide. It was confirmed that the reaction scheme of azide with the degradation reagent is expressed as: N3-+NO2-+2H+ → N2+N2O+H2O
The reaction conforms to a second-order rate law. As the rate determining step, the reaction, HNO2+HN3 → N2+N2O+H2O was deduced. It was known that the degradation reagent was decomposed by aging in acidic solution. It was shown that addition of ammonium acetate suppressed its aging. It is explained as follows; In acetic acid solution, ammonium acetate hydrolyzes to acetate and hydrogen ions, and the solution changes to weak acid due to common ion effect. Consequently, the by-reaction, 3HNO2 → HNO3 + 2NO + H2O is retarded.


Azide, Wet decomposition, Sodium nitrite

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