OHST Practice Exam

Which hazard class does a substance with a known carcinogen property fall under?

1. Environmental Toxicity

2. Acute Toxicity

3. Health Hazard

4. Physical Hazard

The correct answer is: Health Hazard

A substance that has known carcinogenic properties is classified under the Health Hazard category. This classification encompasses substances that can pose risks to human health, particularly those that can cause serious health issues over time, such as cancer, respiratory issues, or reproductive problems. Carcinogens are specifically known to alter cellular structures or functions in a way that leads to cancer, distinguishing them from other hazards that may either cause immediate harm or affect environmental conditions. For instance, while acute toxicity relates to the harmful effects of a substance after a short exposure, and environmental toxicity deals with substances that may harm ecological systems, the Health Hazard class directly addresses risks to physical health over longer periods or repeated exposure. Similarly, physical hazards refer to compounds that present danger in a means that can lead to physical incidents, like flammability or reactivity, rather than the specific health risks associated with carcinogens. Thus, understanding these classifications helps in proper risk assessment and safety measures in environments where these substances may be present.