Division 1.5 refers to which hazard description?

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Multiple Choice

Division 1.5 refers to which hazard description?

Explanation:
Division 1.5 is for explosives that have a mass explosion hazard but are extremely insensitive to initiation. The example given—prilled ammonium nitrate with fuel—fits this description perfectly: it’s very unlikely to detonate easily, yet if it is initiated, it has the potential to produce a mass explosion. That combination of extreme insensitivity with a possible large-scale blast is the hallmark of Division 1.5. The other options point to different classifications: extremely insensitive with no mass explosion hazard would be Division 1.6; a projection hazard is Division 1.3; and a flammable gas at 68 degrees falls under Class 2, not Division 1.

Division 1.5 is for explosives that have a mass explosion hazard but are extremely insensitive to initiation. The example given—prilled ammonium nitrate with fuel—fits this description perfectly: it’s very unlikely to detonate easily, yet if it is initiated, it has the potential to produce a mass explosion. That combination of extreme insensitivity with a possible large-scale blast is the hallmark of Division 1.5. The other options point to different classifications: extremely insensitive with no mass explosion hazard would be Division 1.6; a projection hazard is Division 1.3; and a flammable gas at 68 degrees falls under Class 2, not Division 1.

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