What is a significant risk associated with the detonation of ammonium nitrate?

Ammonium nitrate is known for its potential to cause large explosions, particularly when it is subjected to high heat or stored in significant quantities. This substance is commonly used as a fertilizer and in some industrial applications, but its explosive capabilities can become apparent under certain conditions. When combined with fuel or when it is improperly stored, ammonium nitrate can undergo a process of detonation that releases a massive amount of energy. This characteristic makes it a significant risk in contexts such as transportation, storage, and handling, where safety measures must be meticulously followed to prevent catastrophic outcomes. Thus, the potential for large explosions is a crucial aspect of hazard assessment and emergency response planning regarding ammonium nitrate.

The other choices reflect either a misunderstanding of the risks associated with ammonium nitrate or downplay critical safety concerns. Immediate evacuation is necessary in the event of an explosion but is not a direct risk caused by ammonium nitrate itself. Minimal threat is inconsistent with its known hazards, and while ammonium nitrate can be safe at low concentrations, it still poses a significant threat even in moderate amounts if not properly managed.