A comprehensive safety reference for handling Ammonium Nitrate (UN 1942) incidents. This guide breaks down the critical Decision Matrix based on smoke color—from white decomposition smoke to lethal orange nitrogen dioxide clouds. Learn the "Flood or Flight" protocol, safe evacuation distances (1.6 km), and why traditional firefighting agents like CO2 or foam can trigger a catastrophic explosion. Compliant with NFPA 400 and OSHA industrial safety standards.