Which NFPA color indicates reactive hazard?

Which NFPA color indicates reactive hazard?

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

Answer: (C)

NFPA 704 hazard diamonds use color bands to show different kinds of hazard: blue for health, red for flammability, yellow for instability or reactivity, and white for special hazards. The yellow section specifically communicates how a substance might react or become unstable under certain conditions, such as heat, shock, or contact with incompatible materials. The numbers inside each color (0–4) indicate how severe that hazard is, with higher numbers meaning greater danger. White is reserved for special hazard information, like symbols indicating oxidizers or water reactivity, rather than the general reactivity rating. So, the color that indicates reactive hazard is yellow.

NFPA 704 hazard diamonds use color bands to show different kinds of hazard: blue for health, red for flammability, yellow for instability or reactivity, and white for special hazards. The yellow section specifically communicates how a substance might react or become unstable under certain conditions, such as heat, shock, or contact with incompatible materials. The numbers inside each color (0–4) indicate how severe that hazard is, with higher numbers meaning greater danger.

White is reserved for special hazard information, like symbols indicating oxidizers or water reactivity, rather than the general reactivity rating. So, the color that indicates reactive hazard is yellow.