Hazmat Division 1.5 hazards are described as which of the following?

• A. Mass explosion hazard but are so insensitive that there is little probability of detonation under normal conditions
• B. Extremely insensitive detonating substances that demonstrate negligible probability of accidental propagation
• C. Fire Hazard
• D. Projection Hazard

Answer: (A)

Division 1.5 refers to very insensitive explosive substances that still pose a mass explosion hazard, but are so insensitive that detonation is extremely unlikely under normal handling. This combination—mass explosion potential with negligible probability of initiation—is exactly what defines 1.5. The option describing that scenario fits the official classification.

In contrast, Extremely insensitive detonating substances (1.6) have negligible initiation risk and typically do not present a mass explosion hazard, so they aren’t Division 1.5. The other labels like Fire Hazard or Projection Hazard refer to different kinds of hazards or classifications outside this 1.5 definition.