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

The signal word on a pesticide label serves a crucial function by indicating the product's relative acute toxicity to humans and animals. This system is designed to provide immediate information about the potential health risks associated with the pesticide, helping users to understand the safety precautions they need to take when handling the product.

For example, signal words such as "Danger," "Warning," or "Caution" inform users about the severity of the effects the pesticide might have after a single exposure. This classification not only aids in recognizing the hazardous nature of a product but also plays a critical role in the safe use and management of pesticides in various settings, ensuring that users can make informed decisions regarding their safety.

The other choices do not pertain to the signal word’s primary function; proper disposal methods, ingredient listings, and shelf life are important aspects of pesticide labels but serve different purposes in ensuring safe handling and usage.