UN Packaging symbol: the symbol signifies that a package has been tested and has passed UN packaging performance tests. The symbol should not be applied to a package for any other purpose, especially if that package has not been tested.

UN Codes for Type of Packaging and Material of Construction: There are several different types of packagings along with several different materials in which they are constructed from. The following gives a brief overview of each:

Types of Packaging

• 1 — Drums/Pails

• 2 — Barrels

• 3 — Jerricans

• 4 — Box

• 5 — Bag

• 6 — Composite packaging

Materials of Construction

• A — Steel

• B — Aluminum

• C — Natural wood

• D — Plywood

• F — Reconstituted wood

• G — Fiberboard

• H — Plastic material

• L — Textile

• M — Paper, multi-wall

• N — Metal (other than steel or aluminum)

• P — Glass, porcelain or stoneware (not used in these regulations)

Packing Group: Packing group assignments determine the degree of danger of a dangerous goods item, so the following outlines how to determine if your dangerous goods can go inside of a UN specification package:

• X — for packing groups I, II and III

• Y — for packing groups II and III

• Z — for packing group III

Maximum Gross Weight: For outer packagings intended for solids, this marking will indicate the maximum gross mass (weight) in kilograms at which the package has been tested for.

Year of Manufacture: This represents the last two digits of the year in which the package was manufactured.

Origin of Manufacture: This represents the country where the package was constructed.

Manufacturer Code: The last part of the UN specification marking sequence represents the code for the manufacturing plant or testing facility for the package