The primary hazard of a Department of Transportation Hazard Class 5 material is:

The primary hazard of a Department of Transportation Hazard Class 5 material is:

• A. Radiation
• B. Spontaneously Combustible
• C. Poison
• D. Oxidation

Answer: (D)

Oxidizers are the main hazard of DOT Hazard Class 5 materials. These substances are defined by their ability to release oxygen or otherwise promote the combustion process. That means they can make a fire burn more fiercely or ignite materials that wouldn’t burn on their own by supplying the oxygen needed for the reaction. Organic peroxides in this class can also be hazardous, sometimes explosively, but the common thread is their oxidation effect—providing oxygen to support or accelerate combustion. This is why oxidation is the correct concept. Radiation belongs to Class 7, poisons to Class 6, and spontaneous combustion falls under Class 4, not Class 5.

Oxidizers are the main hazard of DOT Hazard Class 5 materials. These substances are defined by their ability to release oxygen or otherwise promote the combustion process. That means they can make a fire burn more fiercely or ignite materials that wouldn’t burn on their own by supplying the oxygen needed for the reaction. Organic peroxides in this class can also be hazardous, sometimes explosively, but the common thread is their oxidation effect—providing oxygen to support or accelerate combustion. This is why oxidation is the correct concept. Radiation belongs to Class 7, poisons to Class 6, and spontaneous combustion falls under Class 4, not Class 5.