Which toxicity level on a pesticide label indicates that the substance is highly toxic?

The intensity of toxicity levels on pesticide labels is a standardized system that categorizes chemicals based on their potential harmful effects. The most critical classification in this system is the 'Danger' label, marked as 'Danger XXX'. This label signifies that the substance is highly toxic and poses significant health risks if handled improperly. The presence of three X's indicates a severe hazard level, alerting users to take strict precautions.

In contrast, other labels such as 'Caution' and 'Warning' indicate lower toxicity levels. The 'Caution' label is associated with products that are less harmful and generally command a lower level of precaution, while 'Warning' refers to intermediate toxicity levels. Understanding these classifications is vital for ensuring safe handling and applying pesticides effectively, thereby minimizing risks to human health and the environment.