Which NFPA diamond color indicates reactivity hazard?

The NFPA (National Fire Protection Association) labeling system uses a color-coded diamond to indicate the various hazards associated with materials. The yellow color on the NFPA diamond specifically denotes reactivity hazards. This is important because it alerts handlers and responders to the potential for a substance to undergo violent chemical reactions, such as explosion or release of toxic gases when exposed to heat, pressure, or other substances.

Understanding this color coding is crucial for safety in environments where hazardous materials are handled, as it provides essential information to mitigate risks. The other colors in the NFPA system serve different purposes: blue indicates health hazards, red denotes flammability, and white is used for specific information such as radiation or corrosivity. Knowing the function of each color helps ensure effective emergency response and safe handling protocols.