What do refrigerants containing Chlorine or Fluorine do when exposed to flame?

Refrigerants that contain Chlorine or Fluorine can break down when exposed to flame, leading to the production of phosgene, a highly toxic gas. This reaction occurs because the intense heat in the flame can cause the chemical bonds in chlorine and fluorine compounds to break, resulting in the formation of harmful byproducts such as phosgene.

Phosgene is particularly dangerous as it is a colorless gas with a musty odor, and exposure can lead to serious health effects, including respiratory issues and cellular damage. Awareness of this reaction is crucial for technicians working with refrigerants, as it highlights the need for proper handling and safety precautions to prevent dangerous exposure during incidents involving fire or high heat.

While some might think that these refrigerants become inert or do not react at all in such situations, the reality is that the decomposition under heat can produce harmful substances, emphasizing the importance of safety measures in environments where refrigerants are used.