What is the main purpose of a signal word on a pesticide label?

The main purpose of a signal word on a pesticide label is to inform users about the pesticide's acute toxicity. These signal words, which can include terms like "Danger," "Warning," or "Caution," are critical for conveying the level of hazard associated with a pesticide. They help users understand the potential risks involved in handling and applying the product, allowing for informed decisions regarding safety precautions and protective measures.

For example, a signal word categorized as "Danger" indicates that the product can cause severe harm even with minimal exposure, while "Caution" suggests a lower level of toxicity. This clear communication assists pesticide users in taking necessary precautions to protect themselves and the environment during application. Understanding the acute toxicity represented by the signal word is essential for safe handling and application of pesticides.