Certified Healthcare Safety Professional (CHSP) Practice Exam

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Where is hydrogen cyanide (HCN) commonly found?

  1. In cleaning detergents

  2. In coal mines

  3. In laser smoke

  4. In food preservatives

The correct answer is: In laser smoke

Hydrogen cyanide (HCN) is notably found in the combustion products of certain materials, particularly organic substances. One significant source of HCN is in laser smoke, which is produced when materials such as plastics and other synthetics are heated to high temperatures during laser cutting and engraving processes. The breakdown of these materials, especially those that contain nitrogen, can release HCN as a toxic byproduct. This makes the presence of hydrogen cyanide in laser smoke a critical safety concern in environments where lasers are in operation. Understanding this connection is vital for healthcare and safety professionals who need to implement proper ventilation and protective measures to manage exposure risks effectively.