US Department of Transportation (DOT) Pipeline Hazardous Materials Safety Administration
Topic 4 – Marking, Labeling, and Placarding  
Introduction
Topic1: The Hazadous Materials Table
Topic 2: Hazard Classes
Topic 3: Packaging
 Topic 4: Marking, Labeling, and Placarding
Topic 5: Shipping Papers
 Topic 6: Incident Reporting
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Marking: Definition

The HMR require you to mark all hazardous materials intended for transportation in accordance with
Part 172, Subpart D of the HMR. Markings identified in the HMR
include a descriptive name, identification number, instructions, cautions, weight, specification or
UN marks, or combinations thereof, required on outer packagings of hazardous materials.


§ 171.8   Part 172, Subpart D