What is a key characteristic of hazardous materials?

Hazardous materials are defined primarily by their potential to cause harm to health or the environment. This characteristic underscores the importance of identifying and managing these substances safely, as exposure can lead to a range of adverse effects, from minor injuries to serious health conditions or environmental contamination.

Options suggesting that hazardous materials are always visible, have a pleasant odor, or are limited to laboratories do not accurately represent the nature of hazardous materials. Many hazardous materials can be colorless, odorless, or present in forms that are not readily detectable, which is why training and awareness are crucial for identifying and handling them safely. Additionally, hazardous materials can be found in a wide range of environments beyond laboratories, including industries, homes, and natural settings. Thus, the defining characteristic remains their potential to inflict harm.