If the word "Forbidden" appears in the Hazard class column of an entry in the hazardous materials table, what does this signify?

The word "Forbidden" in the Hazard class column of a hazardous materials table indicates that the specific materials cannot be transported by common carriers under any circumstances. This classification is crucial for ensuring safety during transportation, as it identifies substances that pose significant risks and cannot be moved through regular routes typically used by freight services.

When materials are marked as "forbidden," it serves as a clear directive to transport personnel and organizations to avoid handling these materials in a way that could endanger public safety or violate regulatory guidelines. This classification helps to prevent potential accidents and incidents associated with transporting hazardous materials that are deemed too dangerous for standard shipping methods.