What qualifies as a 'hazardous substance' according to the regulations?

The definition of a 'hazardous substance' typically refers to materials that pose risks to public health and the environment when released, particularly in significant quantities. Therefore, a substance released at a predetermined quantity aligns with regulatory definitions whereby specific thresholds trigger labeling, reporting, and safety requirements.

This regulation ensures that if a substance meets or exceeds a certain amount, it is recognized as hazardous due to the potential for causing harm. The predetermined quantity serves as a benchmark for control measures and obligations under environmental protection laws.

Other options may not classify substances effectively regarding hazardous criteria. For instance, a substance being new on the market does not intrinsically make it hazardous; it must still be evaluated based on its characteristics and potential risks. Similarly, while a known acute exposure hazard indicates a level of danger, it is the quantity and context of release that determines regulation under hazardous substance guidelines. Common usage does not automatically classify a substance as hazardous either, as many commonly used materials can be safe when handled properly and within specific thresholds.