What does 'highly toxic vapors' and 'deadly if taken orally' indicate about a pesticide label?

The presence of terms like "highly toxic vapors" and "deadly if taken orally" on a pesticide label indicates that the product poses a significant threat to human health and safety, which is categorized under the danger signal word. This signal word is used for pesticides that can cause severe harm or are considered highly hazardous. The use of "highly toxic," in particular, signals to users that exposure, even in small amounts, can lead to serious health consequences, including potentially fatal reactions if ingested.

In contrast, other signal words such as "caution" and "warning" indicate lower levels of toxicity, suggesting that the products might still be harmful but do not carry the same level of risk as those marked with "danger." Non-toxic would indicate a lack of harmful effects, which is in direct contradiction to what the given phrases imply. Therefore, the labeling with "highly toxic vapors" and "deadly if taken orally" is appropriately aligned with the "danger" classification, reflecting its serious toxicity profile.