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Hydrogen cyanide is a highly toxic gas that can be produced during the combustion of materials containing nitrogen, such as plastics and certain synthetic fabrics. When these materials burn, they can release hydrogen cyanide into the air, posing a significant danger to anyone exposed to it in a fire scenario.

This gas inhibits the body's ability to use oxygen at the cellular level, leading to asphyxiation and potential lethality, even at relatively low concentrations. It is essential for firefighters and first responders to be aware of the presence of hydrogen cyanide, as its rapid onset symptoms can compromise their ability to escape hazardous environments and affect their capacity to perform rescue operations.

In the context of fire incidents, while other gases like carbon dioxide, hydrogen sulfide, and ozone can also be produced, the characteristics and effects of hydrogen cyanide make it particularly concerning in fire emergencies. Understanding the potential dangers of these gases is crucial for effective fire response and safety measures.