In the NFPA 704 system, which color represents health hazards?

In the NFPA 704 system, which color represents health hazards?

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

Answer: (A)

Blue in the NFPA 704 hazard diamond represents health hazards. It communicates the potential harm to a person from exposure, inhalation, ingestion, or skin contact, with higher numbers indicating greater risk. The other colors correspond to different hazard types: red for flammability, yellow for reactivity, and white for special hazards like oxidizers or water reactivity. So blue is the color used to signal health risk.

Blue in the NFPA 704 hazard diamond represents health hazards. It communicates the potential harm to a person from exposure, inhalation, ingestion, or skin contact, with higher numbers indicating greater risk. The other colors correspond to different hazard types: red for flammability, yellow for reactivity, and white for special hazards like oxidizers or water reactivity. So blue is the color used to signal health risk.