Which type of hazardous material is characterized by a high risk of explosion and potential for shrapnel?

The type of hazardous material characterized by a high risk of explosion and the potential for shrapnel is explosives. Explosives are substances that undergo a rapid chemical reaction, producing gas at high temperatures and pressures, which can lead to explosive blasts. This rapid expansion of gases can cause significant damage and propel shrapnel, or fragments of materials, into the surrounding area, posing a danger to people and property.

In the context of hazardous materials, explosives are specifically categorized due to their unique properties and the manner in which they can react. Their classification is crucial for safety protocols and handling procedures to mitigate the risks associated with their potential explosive reaction. Understanding this is vital for peace officers and emergency responders who may encounter such materials in the line of duty.