# Specification cylinders for liquid hazardous materials.

**Citation:** 49 CFR 173.205  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

When § 172.101 of this subchapter specifies that a hazardous material must be packaged under this section, the use of any specification or UN cylinder, except those specified for acetylene, is authorized. Cylinders used for toxic materials in Division 6.1 or 2.3 must conform to the requirements of §

## Document text

When § 172.101 of this subchapter specifies that a hazardous material must be packaged under this section, the use of any specification or UN cylinder, except those specified for acetylene, is authorized. Cylinders used for toxic materials in Division 6.1 or 2.3 must conform to the requirements of § 173.40.

[71 FR 33881, June 12, 2006]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-173.205>
- Source ID: `ecfr`
- SHA-256: `30dba9d462725f2f642bb891f5a8d381a0984adf8d42dc03b93227c4d1d8999c`
- Retrieved: 2026-08-20T05:46:04.092Z
- Exported: 2026-08-22T13:32:07.275Z
- Document slug: `49-cfr-173-205`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "173",
  "section": "173.205",
  "subpart": "Subpart E—Non-bulk Packaging for Hazardous Materials Other Than Class 1 and Class 7",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```