What hazardous gas can be produced from chlorinated hydrocarbons during welding?

Chlorinated hydrocarbons are organic compounds that contain chlorine and can produce several hazardous gases when subjected to high temperatures, as during welding. One significant byproduct is phosgene.

Phosgene is a highly toxic gas that was historically used as a chemical warfare agent. When chlorinated hydrocarbons are heated, especially in the presence of catalysts or at high temperatures typical of welding processes, they can decompose and release phosgene. This gas is particularly dangerous because its effects can be delayed and may result in severe respiratory damage.

The knowledge of how chlorinated hydrocarbons break down under high temperatures is crucial for safety in environments where welding is performed, especially in areas with a potential for such chemicals to be present. Proper ventilation and the use of personal protective equipment are essential to minimize exposure to these hazardous byproducts during welding operations.