What is defined as a receptacle plus any necessary components for containment?

The correct answer is packaging. In the context of hazardous materials, packaging refers to the entire system used to contain and protect the materials during transport and storage. This includes not only the receptacle, which is the primary vessel that holds the hazardous substance, but also any components that are necessary to ensure the containment, safety, and integrity of the materials. This might include things like inner linings, seals, closures, and other features designed to prevent leaks and spills.

Understanding packaging is essential for ensuring that hazardous materials are handled properly and safely, as improper packaging can lead to environmental hazards and risks to human health. By being trained in the proper identification and use of packaging, individuals involved in the transportation or storage of hazardous materials can minimize risks associated with these substances.