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Packing Groups are indicated in Column 5 of the Hazardous Materials Table (HMT), and often more than one packing group will be indicated for a given material.
It is the shipper’s/offeror’s responsibility to determine which packing group applies to the material being shipped.
In addition to the hazard class of a material, the degree of hazard is also indicated by the assignment of packing groups:
There are no packing groups for Class 2, Class 7, ORM-D materials, and some Class 9 and Division 6.2 materials.
The criteria for packing group assignments are found in Part 173 as indicated below:
Hazard class | Section |
---|---|
Class 3 | 173.121 |
Class 4 | 173.125 |
Division 5.1 | 173.127 |
Division 5.2 | 173.129 |
Division 6.1 (including hazard zones) | 173.133 |
Class 8 | 173.137 |
Class 9 | 173.141 |