What symbol indicates a toxic hazard?

The symbol that indicates a toxic hazard is the skull and crossbones. This symbol is universally recognized as a warning sign for poisons and highly toxic substances. It specifically communicates that exposure to the material can result in severe health issues or even death, underscoring the seriousness of the hazard.

In various contexts, the skull and crossbones serve as a clear and immediate visual cue for individuals handling or coming into contact with dangerous substances, ensuring they take the necessary precautions. This icon is part of the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), which standardizes hazard communication to enhance safety in the workplace.