Which color identifies materials that are radioactive according to the NFPA?

The color that identifies materials that are radioactive according to the National Fire Protection Association (NFPA) is yellow. In the NFPA labeling system, different colors represent various hazards associated with substances. Yellow specifically indicates a radiological hazard, which is crucial for ensuring the safety of individuals responding to incidents involving radioactive materials. This color coding helps emergency responders quickly identify the nature of the hazards they might face and take appropriate precautions.

Other colors in the NFPA system have distinct meanings: red represents flammability hazards, blue indicates health hazards, and green typically signifies that a substance is non-hazardous. Understanding the significance of these color codes is essential for hazard recognition and safe emergency response practices.