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Packing Groups

The UN assigns a packing group classifying the regulated material further by the amount of risk each material poses during transportation. The packing group also determines the degree of protective packaging required.


Packing Group I – Greatest Danger

  • Shown as X in the UN marking on the package.
  • Some combinations of different classes of dangerous goods on the same vehicle or in the same container are forbidden if one of the goods is Packing Group I.

Packing Group 1


Packing Group II – Medium Danger

Packing Group 2


Packing Group III – Least Danger

Packing Group 3