What happens when Refrigerant-12 is passed over an open flame?

When Refrigerant-12, also known as dichlorodifluoromethane or CFC-12, is exposed to high heat, such as that from an open flame, it can decompose and produce phosgene gas. Phosgene is a highly toxic compound that poses serious health risks, including respiratory issues and potentially fatal effects if inhaled. This property of Refrigerant-12 to form phosgene under such conditions highlights the danger associated with its improper handling or disposal.

The chemical structure of Refrigerant-12 contains chlorine and fluorine atoms, which, when subjected to high temperatures, can break down and create various byproducts, with phosgene being one of the most concerning. Understanding this reaction is crucial for ensuring safety when working with refrigerants in a cabin atmosphere control system or any refrigeration and air conditioning applications.