Which gas is specifically mentioned as a dangerous fume produced by GTAW?

Phosgene gas is a particularly hazardous substance associated with certain welding processes, including Gas Tungsten Arc Welding (GTAW). It is a toxic gas formed from the reaction of chlorine and carbon monoxide, both of which can be present in the welding environment under specific conditions. Phosgene is dangerous because it can lead to severe health issues, affecting the respiratory system and causing symptoms that might not appear until hours after exposure.

This makes awareness and proper safety measures crucial for anyone involved in welding. Industry best practices include ensuring adequate ventilation in the workspace, using protective equipment, and monitoring for hazardous fume generation. Other gases listed, such as carbon dioxide, helium, and ammonia, do have their own safety concerns in certain contexts, but phosgene is highlighted specifically as a dangerous fume commonly linked to the potential hazards in GTAW environments.