What labeling colors indicate different hazard classes?

The correct answer highlights the specific colors used for labeling different hazard classes under the Hazardous Materials Regulations. In the context of hazardous materials, specific colors serve as immediate visual cues that communicate critical information regarding the nature of the hazards associated with the materials being transported or stored.

Red is universally recognized for flammable liquids, indicating a significant fire risk. Yellow is associated with flammable solids, signaling that these substances can easily ignite under certain conditions. Green is used for non-flammable gases, suggesting that these gases do not pose a fire hazard, while black typically denotes flammable gases, indicating that these gases can also catch fire easily.

Understanding these color codes is vital for ensuring safety during the transportation and handling of hazardous materials. Recognizing the appropriate color labels helps individuals quickly identify the risks involved and take necessary precautions. This is particularly important in emergency situations where time is of the essence and the correct response can mitigate hazards effectively.