Which word signifies the highest level of toxicity in pesticide labeling?

In pesticide labeling, the word that signifies the highest level of toxicity is "Danger." This term is used to indicate that the pesticide poses a significant risk to human health, animals, or the environment and requires strict handling and application precautions. The use of "Danger" on a label signals to users that immediate hazards exist and that they must be particularly vigilant when handling the product.

The other terms listed, such as "Caution" and "Warning," represent lower levels of toxicity compared to "Danger." "Caution" indicates the least danger, while "Warning" suggests a moderate level of toxicity. The absence of a signal word can occur for certain products that meet specific safety criteria, but in situations where a signal word is present, "Danger" is always the highest level of toxicity indicated. This is crucial for ensuring that users are aware of the potential risks and can take appropriate safety measures.