What does a white hazmat placard indicate?

• A. Special hazard.
• B. No hazard indicated.
• C. Flammable liquid.
• D. Radioactive material.

Answer: (A)

White on a hazard placard signals a special hazard beyond the basic health, flammability, and reactivity ratings. In the NFPA 704 system, the blue, red, and yellow sections cover those core risks, while the white section is reserved for special hazards. If there are symbols or letters in that white area (such as indications of water reactivity or oxidizers), they alert you to handling, storage, or response actions that aren’t covered by the standard color panels. That’s why the white placard indicates a special hazard. The other possibilities—flammable liquid or radioactive material—are conveyed by different symbols or color schemes, not by the white section alone, and “no hazard indicated” would not display any special-hazard markings.