The Hazardous Material Regulation (HM-181, along with HM-206) is specified by the U.S. Department of Transportation (DOT) Standard 49 CFR Parts § 171-180. This regulation includes the requirements for proper identification and classification of hazardous materials during transport or shipping. DOT 4-Digit Blank Placards serve as a vital labeling tool in identifying potentially dangerous materials in transport or storage. The blank space on DOT placards allows individuals to quickly and effortlessly add the specific 4-digit UN identification number that corresponds to a particular hazardous chemical, in accordance to DOT.
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