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HandWiki. Ammonium Nitrate Disasters. Encyclopedia. Available online: https://encyclopedia.pub/entry/31810 (accessed on 23 September 2026).
HandWiki. Ammonium Nitrate Disasters. Encyclopedia. Available at: https://encyclopedia.pub/entry/31810. Accessed September 23, 2026.
HandWiki. "Ammonium Nitrate Disasters" Encyclopedia, https://encyclopedia.pub/entry/31810 (accessed September 23, 2026).
HandWiki. (2022, October 28). Ammonium Nitrate Disasters. In Encyclopedia. https://encyclopedia.pub/entry/31810
HandWiki. "Ammonium Nitrate Disasters." Encyclopedia. Web. 28 October, 2022.
Ammonium Nitrate Disasters
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The content is sourced from: https://handwiki.org/wiki/Chemistry:Ammonium_nitrate_disasters

When heated, ammonium nitrate decomposes non-explosively into gases including oxygen; however, it can be induced to decompose explosively by detonation. Large stockpiles of the material can be a major fire risk due to their supporting oxidation, and may also detonate, as happened in the Texas City disaster of 1947, which led to major changes in the regulations for storage and handling. There are two major classes of incidents resulting in explosions: In the first case, the explosion happens by the mechanism of shock to detonation transition. The initiation happens by an explosive charge going off in the mass, by the detonation of a shell thrown into the mass, or by detonation of an explosive mixture in contact with the mass. The examples are Kriewald, Morgan, Oppau, Tessenderlo, and Traskwood. In the second case, the explosion results from a fire that spreads into the ammonium nitrate (AN) itself (Texas City, Brest, Tianjin), or to a mixture of an ammonium nitrate with a combustible material during the fire. The fire must be confined at least to a degree for successful transition from a fire to an explosion (a phenomenon known as "deflagration to detonation transition", or DDT). Pure, compact AN is stable and very difficult to initiate. However, there are numerous cases when even impure AN did not explode in a fire. Ammonium nitrate decomposes in temperatures above 210 °C (410 °F). Pure AN is stable and will stop decomposing once the heat source is removed, but when catalysts are present, the reaction can become self-sustaining (known as self-sustaining decomposition, or SSD). This is a well-known hazard with some types of NPK fertilizers and is responsible for the loss of several cargo ships.

ammonium nitrate non-explosively explosively

References

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