Which color is associated with flammable solids in the DOT hazard class?

The color associated with flammable solids in the Department of Transportation (DOT) hazard class is red. This color-coding is an essential part of the hazard communication system, providing visual indicators of the potential dangers associated with specific materials. Flammable solids can pose significant fire hazards; thus, using red helps alert those who handle, transport, or respond to incidents involving these materials about the inherent risks, prompting appropriate safety measures.

Understanding these color codes is vital for emergency responders and anyone working with hazardous materials, as it allows for quick identification and responsive action when dealing with different types of hazards.