Which division is associated with a mass explosion hazard?

Which division is associated with a mass explosion hazard?

• A. Explosives Division 1.1
• B. Explosives Division 1.2
• C. Gas Division 2.1
• D. Flammable Solids Division 4.1

Answer: (A)

Mass explosion hazard is associated with explosives classified as Division 1.1. In this category, a single initiation could trigger a detonation that involves the entire contents of the load, creating a mass explosion that affects the whole shipment regardless of container size. That immediate, all-at-once destructive potential is what defines Division 1.1. Other divisions describe different hazard patterns—Division 1.2 involves explosion hazards that project fragments or force but not a mass detonation, Division 2.1 covers gases, and Division 4.1 covers flammable solids that can ignite but don’t inherently cause a mass explosion. So the division tied to a mass explosion hazard is Division 1.1.

Mass explosion hazard is associated with explosives classified as Division 1.1. In this category, a single initiation could trigger a detonation that involves the entire contents of the load, creating a mass explosion that affects the whole shipment regardless of container size. That immediate, all-at-once destructive potential is what defines Division 1.1. Other divisions describe different hazard patterns—Division 1.2 involves explosion hazards that project fragments or force but not a mass detonation, Division 2.1 covers gases, and Division 4.1 covers flammable solids that can ignite but don’t inherently cause a mass explosion. So the division tied to a mass explosion hazard is Division 1.1.