What are the four classes of hazardous materials?

The four classes of hazardous materials are categorized based on their characteristics and the potential risks they pose. The correct classification includes explosives, flammable liquids, radioactive materials, and toxic substances.

Explosives are substances that can undergo a rapid chemical reaction, resulting in explosive energy release. Flammable liquids present a fire hazard and can ignite easily under the right conditions, posing significant risks in both industrial and environmental contexts. Radioactive materials emit radiation, which can be hazardous to health and the environment. Toxic substances are harmful or fatal when ingested, inhaled, or come into contact with skin, and their management is critical in ensuring safety and compliance with regulations.

Each of these classes is distinct and subject to specific regulations to ensure proper handling, storage, and transportation to minimize risks to human health and the environment. Understanding these classifications helps professionals respond appropriately in situations involving hazardous materials.