Which statement correctly describes 5.2 Type A materials?

• A. Neither detonates nor deflagrates rapidly.
• B. Cannot undergo thermal explosion.
• C. Can detonate or deflagrate rapidly as packaged for transport.
• D. Detonates only partially or deflagrates slowly.

Answer: (C)

5.2 Type A organic peroxides are extremely unstable substances that can explode or burn violently, even in their packaging for transport. This level of sensitivity means they may undergo detonation or rapid deflagration under normal transport conditions, without needing additional initiation. Detonation involves a shock-driven, supersonic release of energy, while deflagration is a fast flame front moving through the material; Type A peroxides can exhibit either extreme reaction when exposed to heat, shock, or friction.

The other ideas imply stability or only slow or partial reactions, which isn’t accurate for Type A organic peroxides. They are marked by their high instability and potential for rapid, violent decomposition, not by inertness or only gradual burning.