What color is the placard for flammable materials?

Answer: C — Red

The placard for flammable materials is red because this color is universally associated with fire hazards and indicates a significant risk. The red color is used to alert first responders and others to the potential danger posed by flammable substances, which can ignite easily and lead to fires or explosions. This color coding system is part of the Hazardous Materials Identification System to ensure that hazards can be quickly recognized. Each color in the placarding system is designated for specific hazards; for instance, green is often associated with safety or non-hazardous materials, blue typically indicates health hazards, and yellow signifies reactivity. Understanding these color codes is crucial for effectively responding to hazardous materials incidents.