what are overpacks used for in hazardous material
DOT Hazmat Labels, Placards, and Markings - A Guide Hazard Class Labels. Labels are standard hazmat identifiers, designed to meet regulations. Hazard class labels and handling labels are placed on hazardous material packaging such as UN certified packaging, or overpacks. Shippers are responsible for choosing the correct labels for their shipments. Labeling a material incorrectly can result in costly shipping delays, fines, and injuries.