# Class 9—Assignment of packing group.

**Citation:** 49 CFR 173.141  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

The packing group of a Class 9 material is as indicated in column 5 of the § 172.101 table.

## Document text

The packing group of a Class 9 material is as indicated in column 5 of the § 172.101 table.

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-173.141>
- Source ID: `ecfr`
- SHA-256: `2ac19961e8c39282d0819034e3bb4582d093dd9e5f54f8c5463f46c8d035415f`
- Retrieved: 2026-08-20T05:46:04.092Z
- Exported: 2026-08-22T16:34:57.369Z
- Document slug: `49-cfr-173-141`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "173",
  "section": "173.141",
  "subpart": "Subpart D—Definitions Classification, Packing Group Assignments and Exceptions for Hazardous Materials Other Than Class 1 and Class 7",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```