What does the yellow color on the diamond sign represent?

The yellow color on the diamond sign represents the reactivity hazard. This color is used to indicate materials that can undergo rapid chemical reactions, which may include explosions or the release of harmful gases under certain conditions. Understanding the significance of the yellow color is crucial for handling and storing reactive materials safely, especially in environments like healthcare facilities where non-flammable medical gases are utilized. This awareness helps ensure safety protocols are followed to prevent potential incidents related to chemical reactivity.