How is 'biohazard' defined?

The definition of 'biohazard' specifically pertains to biological substances that can pose a risk to human health. This includes pathogens such as bacteria, viruses, fungi, and other microorganisms that can cause disease in humans. Because biohazards can emanate from various sources, such as medical waste, laboratory research, or contaminated environments, they necessitate specific handling and disposal procedures to mitigate the risks associated with exposure.

When considering the other options, a volatile chemical substance might pose hazards but falls under the category of chemical hazards rather than biological. A physical hazard relates more to tangible items that could cause injury, such as machinery or falling objects, rather than biological threats. Lastly, synthetic materials can also present hazards but are not classified as biohazards unless they specifically involve biological substances. Thus, understanding that biohazards are explicitly linked to biological risks is crucial for workplace safety and health management.