Which color on the NFPA placard indicates reactivity hazards?

The color that indicates reactivity hazards on the NFPA placard is yellow. The NFPA (National Fire Protection Association) label employs a color-coded system to communicate the types of hazards present with specific materials. In this system, each color signifies a different category of danger.

Yellow is specifically designated for reactivity hazards, meaning it indicates the potential for the material to undergo a violent chemical change or react with other substances. This requires attention to ensure safety protocols are adhered to in environments where reactive materials are present.

The other colors on the NFPA placard serve different purposes: red represents flammability hazards, blue is for health hazards, and white may signify specific information regarding the material, such as radiation symbols or specific protective equipment needed. Understanding these color codes is essential for ensuring safety in handling hazardous materials.