What are "signal words" used for on pesticide labels?

Signal words on pesticide labels serve an important function by communicating the level of risk associated with the product to users and handlers. These words are specifically chosen to convey the relative hazards of the pesticide's active ingredients in a clear and concise manner. Common signal words include "Caution," "Warning," and "Danger," each indicating a different level of toxicity or potential harm.

By using these signal words, manufacturers provide critical information that helps users assess the safety measures they need to take when handling the pesticide, including personal protective equipment (PPE) requirements and emergency response actions. This enables applicators to make informed decisions about the use of the pesticide, promoting safer application practices and reducing the risk of accidental exposure.

The other options presented do not accurately represent the purpose of signal words. Expiration dates, marketing claims, and ingredient lists serve different functions that do not pertain to conveying risk information. Therefore, understanding the role of signal words is essential for safe and responsible pesticide application.