Which section of the NFPA 704 system is dedicated to reactivity hazards?

In the NFPA 704 system, which is used to communicate the hazards of materials, the section dedicated to reactivity hazards is represented in yellow. This color is specifically designated to indicate the potential for a substance to undergo a violent chemical reaction under certain circumstances.

Reactivity hazards can include the potential for explosive reactions, the ability to polymerize, or the release of gases that could cause pressure build-up. This information is crucial for first responders and individuals handling hazardous materials because it helps them to evaluate the risks associated with that material, particularly in emergency situations or during transport.

The other colors in the NFPA 704 system represent different categories of hazards: red signifies flammability, blue indicates health risks, and green is not included in the NFPA hazard identification system as it does not have a designated classification in the context of the NFPA diamond. This clear color-coding aids in the quick assessment of hazard types, allowing for appropriate safety measures to be taken.