Packaging Your Dangerous Goods

Aviation Safety is dependent on shipping a dangerous good in the correct packaging. If you choose the wrong packaging, you could severely injure a transportation worker, harm the environment, or cause catastrophic damage to an aircraft.

The appropriate dangerous goods packaging is based on the most appropriate hazard classification of a product and its physical attributes. For example, you cannot ship corrosive materials in metal packages because corrosives violently react with metal and will eventually destroy the package.

Packaging requirements vary depending on the type, class, and quantity of dangerous goods you are shipping. Often, packaging must be tested and certified to meet the requirements of the regulations for shipment of dangerous goods by air. 49 CFR, Part 173 lists the general packaging requirements that apply to bulk and non-bulk packaging, new and reused packaging, and specification and non-specification packaging.

The appropriate packaging is also dependent on the Packing Group of the material. The Packing Group is a grouping of substances (other than those in Hazard Class 2, Class 6 Division 2, and Class 7), in accordance with the degree of danger they present:

  • Packing group I: substances presenting high danger;
  • Packing group II: substances presenting medium danger; and
  • Packing group III: substances presenting low danger.

UN specification packaging, or Performance Oriented Packaging (POP), is required for most air shipments of dangerous goods. POP is packaging that must pass several tests to ensure that packages are strong enough to withstand the shocks, loadings, and atmospheric pressure changes normally encountered during transportation.

Packages that have successfully passed these tests will bear UN markings to certify that they have passed the required tests. The markings indicate the level of testing that a package has passed. See the Package ID Table (below) to assist you in determining the correct packaging identification. The reference for all performance oriented packaging standards and tests can be found in the Code of Federal Regulations, Title 49, Part 178.

Follow these procedures when determining if a package is authorized for use:

  1. Look up the Proper Shipping Name (PSN) in the Hazardous Materials Table (HMT) in 49 CFR or the Dangerous Goods List in the ICAO TI.
  2. Locate and follow the appropriate packaging information and instructions in Column 8 on the HMT, or Column 10 on the TI.
  3. Verify that the package is properly marked IAW Part 178.
  4. Verify that the package is authorized for the PG indicated in the HMT.
  5. Verify that Column 7 "Special Provision Codes" or Column 9 "Packing Provisions" does not further restrict the package.

Packaging Tips

  • Check the segregation tables – Be sure not to pack dangerous goods with incompatible dangerous goods that may react dangerously with other dangerous goods.
  • You must carefully follow the information in the package closure instructions. Package manufacturers test UN specification packages with the materials listed in the closure instructions. A variation from the manufacturer's closure instructions could compromise the integrity of the package and result in non-compliance.
  • Ensure that your completed package does not exceed the tested weight of the package (in kilograms). See below:

Where can I obtain appropriate packaging for my material?

You can purchase packaging for the shipment of dangerous goods by air through a variety of commercial sources. As the FAA is a government entity, we cannot endorse or recommend a specific supply source for packaging that will meet the regulatory requirements of your materials. However, vendors are readily available on the internet.

Sample UN Markings

illustration showing UN markings for solids

illustration showing UN markings for liquids

Package ID Table

The markings indicate the level of testing that a package has passed.

This table provides a reference to assist you in determining the UN package identification. These codes can be found in section 178.504 through 178.523.

Reference for determining the UN package identification
Type Material Category Performance Standard
1 – Drums
2 – Barrels
3 – Jerricans
4 – Boxes
5 – Bags
6 – Composite packaging
7 – Pressure receptacle
A – Steel
B – Aluminum
C – Material Wood
D – Plywood
F – Reconstituted Wood
G – Fiberboard
H – Plastic
L – Textile
M – Paper, Multi-wall
N – Metal other than Steel or Aluminum
P – Glass Porcelain, Stoneware

A, B, or H Drums – Jerricans
1 – Removable Head
2 – Non-Removable Head

A or B Boxes
1 – Ordinary A or B
2 – A or B with liner or coatings

C Boxes
1 – Ordinary
2 – W/sift proof wall

H Boxes
1 – Expanded Plastic
2 – Solid Plastic

L Bags
2 – Sift Proof
3 – Water Resistant

M Bags
2 – Multiwall, Water Resistant


Density or Specific

For single packages containing liquids, you'll find the specific gravity of a material, i.e. /Y1.5/. For packaging intended for solids or for combination packages, an "S" in uppercase will follow the gross mass, i.e., /X13/S/.

Hydraulic Pressure

Hydraulic Pressure in Kilo-Pascal (kPa) (applies to liquids). This will follow the specific gravity.


Year of Manufacture


Country Where Package was Manufactured


Code for UN Certifying Agency or Manufacturer

Last updated: Thursday, June 8, 2023