Which hazard is denoted by the Skull and Crossbones symbol?

The Skull and Crossbones symbol is universally recognized as a warning for acute toxicity that can be fatal. This symbol is typically found on labels of substances that pose significant health risks when ingested, inhaled, or come into contact with the skin. The presence of this symbol signals that exposure to the chemical could lead to severe health consequences, including death, particularly in cases where even a small amount can be extremely harmful. This is why it’s crucial for individuals working with or around hazardous materials to recognize and understand the implications of this warning symbol.

The other options relate to different hazards that do not align with the specific danger represented by the Skull and Crossbones. For example, ozone-depleting substances and radiation hazards are indicated by other symbols, and skin irritation typically has a different warning symbol representing lower levels of toxicity. Understanding the precise meaning of various hazard symbols helps ensure safety and compliance in environments where hazardous substances are present.