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Hazardous Waste Transportation 437
TABLE 13.3 (Continued )

• When articles or devices are specifically listed by name, the net quantity limitation applies to the entire article (less
packaging) rather than only to its hazardous components.
• A package offered or intended for transportation by aircraft and which is filled with a material forbidden on passenger-
carrying aircraft but permitted on cargo aircraft only, or which exceeds the maximum net quantity authorized on pas-
senger-carrying aircraft, shall be labeled with the CARGO AIRCRAFT ONLY label specified in 49 CFR §172.448.
Column 10: Vessel Stowage Requirements
Column 10A (Vessel stowage) specifies the authorized stowage locations on board cargo and passenger vessels. Column
10B (Other provisions) specifies codes for stowage requirements for specific hazardous materials. The meaning of each
code in Column 10B is set forth in Section 176.84 of this subchapter. Section 176.63 of this subchapter sets forth the
physical requirements for each of the authorized locations listed in Column 10A.
Source: 49 CFR 172.101. With permission.

TABLE 13.4
Instructions for Selecting Proper Shipping Names for Hazardous Materials

1. Apply the most specific name listed in the Hazardous Materials Table (49 CFR §172.101). The DOT ranks the order
of specificity as follows:
• Specific chemical name (e.g., “Sulfuric acid”)
• Chemical group or family (e.g., “Acid, liquid, n.o.s.”)
• End use of material (e.g., “Pigment”)
• Generic end use (e.g., “Medicines, n.o.s.”)
• Hazard class (e.g., “Corrosive liquid, n.o.s.”)
When hazardous waste is being shipped, the word “waste” must be included in the shipping name.
2. There are to be no additions or deletions to a shipping name except as explicitly allowed by DOT. When the term
“n.o.s.” (not otherwise specified) is used, additional information must be included which will identify at least two
major constituents present in the waste which contribute to the Hazard Class.
3. Once the most appropriate name has been selected it is assigned a specific ID number, i.e., UN or NA followed by
four unique digits. The information compiled thus far, i.e., proper shipping name, Hazard Class, and the UN or NA
number, comprise the U.S. DOT “Basic Description.”
The DOT description must be in the following order:
• Proper shipping name, Hazard class, and UN or NA number
• Additional information

4. The packing group Roman numeral is assigned.
5. Reportable Quantity (RQ) values are assigned, if applicable. The RQ value for a constituent in the material is listed in
the Appendix to 49 CFR §172.101, List of Hazardous substances and Reportable Quantities. If the weight of the con-
stituent meets or exceeds the RQ, then RQ must be added to the proper shipping name.
6. The completed form for shipping a hazardous waste is as follows:
• RQ, proper shipping name, hazard class, UN/NA number, packing group
• Additional information
Source: 49 CFR §172.101, Appendix A. With permission.

13.3.3.5 Identification Numbers
The DOT has assigned a four-digit identification number to each of the hazardous materials regu-
lated in transportation. When appearing in shipping papers and other documentation, the letters
“UN” or “NA” precedes these numbers. The UN numbers, such as UN1823 for solid sodium
hydroxide, were assigned in cooperation with the United Nations and are used for international
shipments. The NA numbers are not used for international transportation except to and from Canada
(49 CFR §172.101).