# Nickel carbonyl.

**Citation:** 49 CFR 173.198  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

(a) Nickel carbonyl must be packed in specification steel or nickel cylinders as prescribed for any compressed gas except acetylene. A cylinder used exclusively for nickel carbonyl may be given a complete external visual inspection instead of the pressure test required by § 180.205 of this subchapte

## Document text

(a) Nickel carbonyl must be packed in specification steel or nickel cylinders as prescribed for any compressed gas except acetylene. A cylinder used exclusively for nickel carbonyl may be given a complete external visual inspection instead of the pressure test required by § 180.205 of this subchapter. Visual inspection must be in accordance with CGA Pamphlet C-6 (IBR, see § 171.7 of this subchapter).

(b) Packagings for nickel carbonyl must conform to § 173.40.

[Amdt. 173-224, 55 FR 52643, Dec. 21, 1990, as amended at 67 FR 51643, Aug. 8, 2002; 68 FR 75742, Dec. 31, 2003]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-173.198>
- Source ID: `ecfr`
- SHA-256: `f83e16e3f574ea504af1a0b3a6a43a7ba32ea6587a9224d96cc5ac8c40347a9b`
- Retrieved: 2026-08-20T05:46:04.092Z
- Exported: 2026-08-22T22:22:37.392Z
- Document slug: `49-cfr-173-198`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "173",
  "section": "173.198",
  "subpart": "Subpart E—Non-bulk Packaging for Hazardous Materials Other Than Class 1 and Class 7",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```