How are hazardous materials classified under the HMR?

Hazardous materials are classified under the Hazardous Materials Regulations (HMR) based on their physical and chemical properties, as well as their potential risks. This classification system encompasses a wide range of factors, including the nature of the material, its behavior under various conditions, and the kinds of hazards it can pose to health, safety, and the environment.

For example, materials are evaluated for flammability, reactivity, corrosivity, and toxicity. This comprehensive risk assessment helps ensure that appropriate precautions are taken during transportation, handling, and storage to protect people and the environment.

Other classification methods, such as origin country, weight and dimensions, or packaging materials, do not provide a complete picture of the hazards posed by a material. The correct classification under the HMR must prioritize the intrinsic properties and potential dangers associated with the material itself, making option B the correct choice.