Which Hazard Class under the U.N. Labeling System is assigned to a substance that readily yields oxygen to support combustion?

• A. 2
• B. 3
• C. 4
• D. 5

Answer: (D)

The correct answer is identified as the Hazard Class that deals with substances that readily yield oxygen to support combustion, which falls under Class 5 of the U.N. Labeling System. This class includes oxidizers, which are materials that can cause or enhance the combustion of other materials. This capability to release oxygen makes oxidizers particularly hazardous, as they can lead to fires or explosions in conjunction with flammable substances.

Understanding this classification is key for safe handling and storage practices, as well as for emergency response in case of an incident. Knowledge of oxidizers enables those involved in hazardous materials management to implement appropriate safety measures and respond effectively to potential risks during transportation, storage, or use.