Which signal words are the most severe in denoting pesticide toxicity?

The phrase "DANGER-POISON" signifies the highest level of toxicity in pesticide labeling. The use of "DANGER" indicates an immediate threat to health, while "POISON" further intensifies this message, explicitly conveying that exposure can lead to severe effects or even death. This combination serves to alert users of the utmost urgency in handling such chemicals, prompting them to take extreme precautions.

On the other hand, combinations that include "WARNING" or "CAUTION" represent lesser degrees of toxicity. "WARNING" indicates a moderate level of toxicity, while "CAUTION" suggests the lowest toxicity level among the label’s classifications. This hierarchy in language is crucial for users to understand potential risks and adhere to safety protocols when dealing with pesticides.