Which signal word indicates low acute toxicity in humans?

The signal word "Caution" is used on pesticide labels to indicate low acute toxicity in humans. This classification is part of a standardized system that helps communicate the potential risks associated with pesticide products.

When a label features "Caution," it generally signifies that exposure to the pesticide may cause mild injuries or irritation, but it is not likely to result in severe health effects from a single exposure. This helps users to understand that while precautions are still necessary, the product poses a lower risk compared to those with more severe signal words.

In contrast, using terms like "Careful," "Hazard," or "Poison" suggests higher levels of risk. For instance, "Poison" indicates a high degree of acute toxicity and suggests immediate and serious health consequences with exposure. "Hazard" generally refers to a dangerous situation or condition that could lead to harm, and while it can relate to toxicity, it’s not a standard signal word for acute toxicity levels. "Careful" lacks a defined toxicity level and does not follow the established guidelines for signal words on pesticide labels. Understanding these distinctions is crucial for safely handling and applying pesticides.