The NFPA 704 placard identifies hazards in what color for health risks?

The NFPA 704 placard uses color coding to indicate the type of hazards associated with materials. For health risks, the color blue is designated. This system is designed to provide quickly recognizable information about the hazards to emergency responders. By using blue for health risks, the placard clearly communicates the level of hazard one may face in a health-related emergency involving the substance in question.

The other colors indicate different hazards: red represents flammability risks, yellow denotes reactivity, and white is used for specific hazards such as radiation or corrosivity. Understanding this color coding is crucial for safety and can guide effective emergency response.