Which cancer-causing material do transformers contain?

Transformers contain polychlorinated biphenyls (PCBs), which are a group of synthetic organic chemicals that have been used in electrical equipment due to their insulating and cooling properties. PCBs are recognized for their potential health hazards, as they are classified as probable human carcinogens. This classification is based on evidence linking PCB exposure to various types of cancer and other serious health effects.

In transformers, PCBs were commonly used until their production was banned in the late 1970s due to environmental and health concerns. Their stability and persistence in the environment contribute to the risks associated with exposure, as they do not easily break down and can accumulate in the food chain.

Understanding the presence of PCBs in transformers emphasizes the importance of proper handling and disposal methods for equipment containing these substances, particularly for first responders and firefighters who may encounter such equipment in emergency situations. Knowledge of their hazardous nature is crucial to ensure safety and health in the face of potential exposure.