What color is typically used for caution or warning placards in hazardous materials?

The color typically used for caution or warning placards in hazardous materials is yellow. Yellow is universally recognized as a signal for caution, alerting individuals to potential hazards that require attention and careful navigation. In the context of hazardous materials, yellow placards indicate that a substance may pose a risk but does not necessarily require immediate evacuation or intense emergency measures.

This color coding is part of the broader system used for emergency response, ensuring that hazards are visually communicated to responders and the public. Understanding these color codes is essential for firefighters and emergency personnel as they work to identify and mitigate hazards safely.