Markings

When you offer a hazardous material for transportation, or transport a hazardous material, you must mark each package, freight container, and transport vehicle containing the hazardous material as required by the HMR. The term marking refers to placing the required information on the outer package containing the hazardous materials. This includes a proper shipping name, identification number with the appropriate prefix, and specifications or UN markings, plus any other required information, instructions, and cautions.

All markings must be placed on packages so that no part of the marking or any other required marking or label is covered or obscured in any way. Markings that relate to one another should be placed together on the same side of the package so as not to cause confusion or limit their effectiveness. In addition, all markings should meet the following requirements:

• Durable and printed or otherwise marked on, or affixed to, the external surface of the package or overpack, or on a label, tag, or sign
• Readily visible and legible
• Able to withstand open weather exposure
• Written in English as well as the language required by the State of origin
• Displayed on a background of sharply contrasting color
• Located away from any other marking, such as advertising, that could substantially reduce the effectiveness

To learn more about DOT HAZMAT Awareness visit our DOT HAZMAT General Awareness Online Training web page.