Which hazmat class includes toxic and infectious substances?

• A. Class Six - Toxic and Infectious Substances
• B. Class One - Explosives
• C. Class Two - Gases
• D. Class Seven - Radioactive Material

Answer: (A)

Hazmat classification groups materials by the health and safety risks they pose, so the rules for packaging, labeling, and transport line up with the specific danger. Toxic and infectious substances are combined into one class because both create serious health risks to people who handle or are exposed to them—toxins can harm through chemical injury, while infectious substances contain or may contain biological agents that can cause disease. Because of these shared health hazards, this class sets strict containment, packaging standards, labeling, and transport requirements to keep people and the environment safe.

Explosive materials belong to a class defined by the risk of a violent release of energy, which is a different kind of hazard than toxicity or infection. Gases form a separate class due to hazards like pressure, flammability, or asphyxiation, not infectious or toxic risk. Radioactive materials are classified separately because they involve ionizing radiation hazards rather than chemical or biological health risks.