An ID number for material that is used for items only shipped in the US and Canada will be preceded by _________.

Column 4:
Lists the identification number for each proper shipping name. Identification numbers are preceded by the letters UN or NA. The letters NA are associated with good shipping names used only within the United States and to and from Canada. The identification number must now appear first on the shipping paper as part of the shipping description and on the package. The identification number should always appear on cargo tanks and another bulk packaging. Police and firefighters use this number to identify hazardous materials quickly.