What signal word is required on the label for pesticides that are classified as "Highly toxic"?

The signal word required on the label for pesticides that are classified as "Highly toxic" is "Danger!" This classification indicates that the product has a high potential for causing harm or injury through exposure, whether by skin contact, inhalation, or ingestion. The use of "Danger!" serves as a clear and immediate warning sign to individuals handling or using the pesticide, alerting them to the serious risks associated with the product.

In the labeling system, different signal words indicate varying levels of toxicity and potential hazards. "Caution!" typically denotes lower toxicity and is used for products that may be harmful but are less hazardous than those labeled with "Warning!" or "Danger!" Similarly, "Warning!" indicates a moderate toxic level, but it does not convey the same immediacy of risk as "Danger!" Therefore, the choice of "Danger!" for highly toxic products effectively communicates the urgent need for safety precautions to prevent exposure and potential health consequences.