Associate Certified Entomologist (ACE) Practice Exam

Which signal word corresponds to the highest toxicity category?

1. Warning

2. Caution

3. Danger

4. Consideration

The correct answer is: Danger

The signal word that corresponds to the highest toxicity category is "Danger." This term is used to indicate substances that pose a significant risk of acute effects, meaning exposure can result in severe harm, including fatal outcomes. In pesticide labeling, for instance, "Danger" is reserved for those products classified as highly hazardous, necessitating strict safety measures during handling and application. In contrast, "Warning" is typically used for moderately toxic substances, implying a lower level of risk, while "Caution" refers to those that are generally considered less dangerous. The term "Consideration" is not recognized as a standard signal word in toxicity classifications, further emphasizing the significance of "Danger" as the clear indicator of the highest level of toxicity.