What does the white section of the NFPA 704 placard indicate?

The white section of the NFPA 704 placard specifically designates special hazards or precautions related to the material being indicated. Unlike other sections of the placard that provide information about health hazards, flammability, and reactivity using numbers to assess their degree, the white section is utilized for additional identifiers that might be critical for emergency response.

This could include symbols or letters representing specific hazards, such as radiation or the presence of certain acids. Understanding this section is essential for anyone working with hazardous materials, as it highlights any unique risks that responders should be aware of during an emergency situation. This clarity about special precautions helps ensure safety and preparedness when dealing with various materials in a controlled or unpredictable environment.