What is the function of the signal word on a pesticide label?

The function of the signal word on a pesticide label is to provide an indication of the relative acute toxicity of the product to humans and animals. The signal word is crucial as it communicates the danger level associated with the pesticide, guiding users on the safe handling procedures required.

For instance, signal words such as “Caution,” “Warning,” or “Danger” are assigned based on the degree of toxicity; “Caution” indicates low toxicity, while “Danger” signifies high toxicity. This classification helps applicators understand potential health hazards and take appropriate safety measures when using or handling the pesticide.

The other options provide valuable information, but they do not specifically pertain to the core function of the signal word. For example, while the first aid treatment and personal protective equipment (PPE) information are essential for safe handling, they are typically outlined elsewhere on the label, not indicated by the signal word itself. Similarly, toxicity to wildlife and the environment is an important consideration, but it does not define the primary purpose of the signal word, which focuses on human and animal safety.