Which pictogram represents that a chemical may cause prolonged health effects?

• A. Health hazard
• B. Skull and crossbones
• C. Exclamation mark
• D. Environment

Answer: (A)

Pictograms on chemical labels convey the type of harm a substance can cause. The health hazard pictogram signals prolonged or irreversible health effects from exposure, such as carcinogenicity, reproductive toxicity, or chronic organ toxicity, so it best fits the idea of long-term health risk. The skull-and-crossbones pictogram indicates acute toxicity—harmful or fatal in a single exposure. The exclamation mark marks less severe hazards like irritation or sensitization or short-term toxicity. The environment pictogram points to hazards to the environment, particularly aquatic life, not to human health. So the health hazard symbol is the one that represents potential prolonged health effects.