What is the name given to a product that may pose an unreasonable risk to health or property when transported, stored, or used in commerce?

The term that describes a product posing an unreasonable risk to health or property during its transportation, storage, or use in commerce is "hazardous material." This classification is widely recognized in regulations and standards concerning the handling and management of substances that might be dangerous to humans or the environment.

Hazardous materials can include various chemicals, biological agents, or even certain types of waste that, if not properly managed, could lead to negative consequences such as spills, leaks, or reactions. Understanding this term is crucial for professionals who work in fields that involve the transport, storage, or management of chemicals and materials, as it is fundamental to the assessment of risk and the implementation of necessary precautions.

The other options describe related but distinct concepts. Hazard class is a classification system to categorize the level of risk associated with different types of hazardous materials. A hazardous chemical is a broader category that includes any chemical that poses a risk but may not specifically refer to its commercial handling context. Hazardous substances typically refer to materials defined under specific regulations, often concerning environmental impacts or specific legal definitions, which may not cover the broader commercial implications of hazards present in transportation and use.