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

The primary role of the signal word on a pesticide label is to reflect the product's toxicity level. Signal words serve as a quick and easily understandable indicator of the potential risk associated with the use of the pesticide. These words—commonly categorized as "Caution," "Warning," or "Danger"—help users assess the safety measures they need to take and the degree of hazard posed by the product.

For instance, a product labeled with "Danger" indicates a higher toxicity level, signaling that the user must exercise extreme caution and utilize more stringent protective measures. This differentiation allows users to prioritize safety based on the nature of the pesticide they are handling, which is crucial for both personal safety and environmental protection.

The other options relate to aspects of pesticide labeling but do not accurately reflect the primary function of the signal word. Legal disclaimers, primary usage, and ingredient lists are all important components of a pesticide label, but they do not carry the same crucial health and safety information as the signal word, which is specifically designed to convey toxicity level succinctly.