What color is used for class 3 placards?

Class 3 placards are designated for flammable liquids, which are substances that can easily ignite and pose significant fire hazards during transportation. The color used for these placards is red, as red is universally associated with fire and danger. This color choice serves as a clear visual signal for emergency responders and others who are handling or observing the transportation of hazardous materials, alerting them to the potential risks. Using red for Class 3 placards helps ensure that individuals are immediately aware of the need for caution and appropriate action when dealing with such materials.

In this context, the other colors listed do not align with the designated classifications for hazardous materials. For instance, blue is typically associated with health hazards, yellow often relates to reactive materials, and green is used for non-flammable gases. The distinct use of red for Class 3 placards is crucial in promoting safety and understanding in hazardous materials management.