Which Division of explosives has the highest hazard class?

Division 1.1 of explosives represents the highest hazard class as it includes materials that can detonate and cause mass destruction. This division is specifically classified for explosives that present a significant risk because they can explode in a manner that leads to the creation of a shock wave and a large number of fragments, potentially affecting a wide area.

The reason Division 1.1 is considered the most hazardous is due to the nature of the substances it encompasses, which can produce dangerous and uncontrolled explosions, leading to serious threats to life, property, and the environment. This classification is crucial for ensuring that stringent safety measures and shipping regulations are adhered to, minimizing exposure to these high-risk materials.

In comparison, the other divisions, such as Division 1.2, which includes explosives with a lesser hazard that do not create a mass detonation hazard; Division 1.3, which covers explosives that create fire hazards; and Division 1.4, which involves low-risk explosives with limited danger, all indicate decreasing levels of risk and hazard associated with their use and transport. Division 1.1 stands out as handling the most potent and dangerous explosives, warranting its position at the top of the classification hierarchy.