What color indicates a reactivity hazard in the hazard identification system?

In the hazard identification system, a yellow color specifically denotes a reactivity hazard. This classification is part of a visual communication system used to quickly convey the potential dangers associated with various materials. Reactivity hazards indicate that a substance might be unstable or can react vigorously with other materials or under certain conditions, leading to possible explosions or release of hazardous substances.

Understanding this classification is crucial for emergency responders as it helps them assess the level of risk and determine appropriate precautions when dealing with hazardous materials. Other colors in the system relate to different types of hazards, such as flammability or health risks, but in this context, yellow solely represents reactivity. This knowledge is essential for ensuring safety during EMS operations and effectively managing risks associated with hazardous situations.