Products labeled with the signal word DANGER may also include which symbol?

Products labeled with the signal word "DANGER" may include the skull and crossbones symbol because this combination indicates a high level of acute toxicity. The skull and crossbones symbol serves as a visual warning that emphasizes the potential for serious harm if the product is ingested, inhaled, or comes into contact with skin.

The use of this symbol along with the signal word "DANGER" is part of the Globally Harmonized System of Classification and Labeling of Chemicals (GHS), which aims to ensure that hazards are clearly communicated to users. The presence of the symbol reinforces the need for strict safety precautions when handling such products.

In contrast, while the biohazard symbol indicates biological hazards, it does not universally accompany the "DANGER" label. Similarly, the radioactive and flammable symbols denote specific hazards related to their respective categories and do not necessarily correlate with the "DANGER" designation regarding acute toxicity. Thus, the skull and crossbones is specifically associated with the grave dangers related to highly toxic substances.