Which United Nations specification aims to keep hazardous materials contained and safe from the environment?

The Performance Oriented Packaging specification is designed to ensure that packaging for hazardous materials is effective in containing the materials and preventing any leakage, rupture, or deterioration during handling and transport. This specification takes into consideration the types of hazards associated with particular materials, ensuring that the packaging meets specific performance criteria for resistance to potential impacts, vibrations, or other stresses that may occur during transportation. This approach enhances safety for both handlers and the environment by minimizing the risks associated with the transportation of hazardous substances.

The other options, while they may sound relevant to the context of hazardous materials, do not specifically focus on the performance and safety standards in managing hazardous material packaging as effectively as Performance Oriented Packaging does.