The fact that a product is water reactive would be indicated in the _____ quadrant of the NFPA 704 system.

The fact that a product is water reactive would be indicated in the _____ quadrant of the NFPA 704 system.

• A. White
• B. Blue
• C. Red
• D. Yellow

Answer: (A)

Special hazards go in the white quadrant of the NFPA 704 diamond. The blue, red, and yellow sections cover health, flammability, and reactivity in general terms, but anything that's not captured by those categories—like water reactivity—belongs in the white quadrant. A water-reactive material is indicated there with a symbol such as a W (often shown with a strike-through or other note) to signal that water can trigger a reaction. This placement helps responders know to avoid water-based actions and follow specific handling instructions for that material.

Special hazards go in the white quadrant of the NFPA 704 diamond. The blue, red, and yellow sections cover health, flammability, and reactivity in general terms, but anything that's not captured by those categories—like water reactivity—belongs in the white quadrant. A water-reactive material is indicated there with a symbol such as a W (often shown with a strike-through or other note) to signal that water can trigger a reaction. This placement helps responders know to avoid water-based actions and follow specific handling instructions for that material.