What is the signal word used in categories 3 and 4?

The term "Caution" is the signal word used in pesticide categories 3 and 4, which indicates a level of toxicity that is lower than that found in categories 1 and 2. In the labeling of pesticides, the signal words are crucial as they provide immediate information about the potential hazards associated with the chemical.

Signal words serve to communicate the level of toxicity quickly and effectively. "Caution" suggests that while the pesticide may still pose some risk, it is significantly less than those products classified with the signal words "Warning" or "Danger." The use of "Caution" is designed to inform users that they can handle the product with basic safety measures, although care should still be taken to avoid misuse or accidents.

Understanding these categories and their associated signal words is fundamental for pest control technicians, as it allows them to assess the materials they work with and implement appropriate safety protocols. The categorization helps to ensure that technicians and consumers can make informed decisions about the risk level of various pesticides.