Which signal word would likely describe a product that is highly toxic by at least one route of entry?

The signal word "Danger" is used to indicate a product that is highly toxic by at least one route of entry, such as ingestion, inhalation, or skin absorption. This classification is part of an important communication system that informs users about the potential hazards associated with the chemical. A product labeled with "Danger" suggests that it can cause severe health effects or even fatality if proper precautions are not taken, highlighting the need for careful handling and use.

In contrast, "Caution" and "Warning" indicate products that are less toxic, with "Caution" typically associated with relatively low toxicity and "Warning" representing moderate toxicity. The term "Non-toxic," on the other hand, suggests that a product poses no significant risk to health, which clearly does not align with the description of a product that is highly toxic.