Which statement is true about chemical burns?

Chemical burns are unique in that they can occur without an external visible source of heat. Unlike thermal burns, which typically result from contact with hot objects or flames, chemical burns result from exposure to corrosive substances like acids or alkalis that can cause injury on contact. This means that even in a cool environment, coming into contact with certain chemicals can lead to serious injury.

Understanding the nature of chemical burns emphasizes the importance of handling hazardous materials with care, even if there is no heat present. In many cases, the damage caused by a chemical reaction can be significant and often deeper than surface level, which is why awareness and protective measures are critical in environments where chemicals are handled.

The other statements do not accurately describe the properties of chemical burns. For instance, chemical burns can indeed extend beyond the skin into underlying tissues, causing extensive damage. Additionally, while there are classifications for burns, chemical burns might not always fit neatly into the standard three classifications (first, second, and third degree) as they are influenced by the specific chemical involved and the duration of exposure.