- HCN is a byproduct of the combustion of any organic material containing carbon and nitrogen.
- Commonly found during the overhaul phase of structural firefighting in today's environment
- The enzyme cytochromoxidase is responsible for the energy-providing processes in the cell where oxygen is utilized.
- HCN toxicity is caused by the cyanide ion, which halts cellular respiration.
- If the poisoning occurs rapidly, there is no time for symptom development and the exposed persons may suddenly collapse and die. [7]
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