Title 49 of the United States Code of Federal Regulations (49CFR) also known as the Federal Motor Carriers Safety Regulations (FMCSR) requires the use of hazardous materials placards when shipping hazardous materials, cargo and dangerous goods in the United States. Canada and Mexico also have simular regulations that require the use of these placards.

UN/NA numbers (the four digit number) found on bulk placards refer to specific chemicals or groups of chemicals and are assigned by the United Nations and/or the United States Department of Transportation.

Jomac offers DOT placards as well as other types of safety signs and decals.