Which color on the left side of the hazardous materials diamond represents health hazard?

Which color on the left side of the hazardous materials diamond represents health hazard?

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

Answer: (A)

In the NFPA 704 hazard diamond, the left-hand quadrant is blue and indicates health hazard. This color tells you about the medical risks from exposure, such as toxicity or irritation. The number in the blue area (0–4) communicates how severe that health risk is, with higher numbers meaning greater danger. The other sides—the top red quadrant for flammability, the right yellow quadrant for instability/reactivity, and the bottom white quadrant for special hazards—work together to give a quick, overall picture of the material’s hazards.

In the NFPA 704 hazard diamond, the left-hand quadrant is blue and indicates health hazard. This color tells you about the medical risks from exposure, such as toxicity or irritation. The number in the blue area (0–4) communicates how severe that health risk is, with higher numbers meaning greater danger. The other sides—the top red quadrant for flammability, the right yellow quadrant for instability/reactivity, and the bottom white quadrant for special hazards—work together to give a quick, overall picture of the material’s hazards.