What signal word is used for substances that are slightly toxic?

The term "Caution" is specifically used to indicate substances that have low toxicity or those that pose only a slight risk to health under normal circumstances. When a product bears this signal word, it informs users that while the material may present some level of hazard, it is significantly less severe compared to substances labeled with stronger signal words.

The context also matters: "Warning" typically denotes a higher level of toxicity or hazard. "Danger" is reserved for the most hazardous materials, indicating a potent risk of severe harm or fatality. The term "Hazard" is more general and does not specifically categorize the level of toxicity but can often serve as an umbrella term for substances that present various risks. Therefore, "Caution" makes it clear that while there is a risk, it is relatively low and manageable with proper safety measures.