# Compatibility necessary for transportation of hazardous liquids or carbon dioxide.

- **operation:** document
- **citation:** 49 CFR 195.4
- **title:** Compatibility necessary for transportation of hazardous liquids or carbon dioxide.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** No person may transport any hazardous liquid or carbon dioxide unless the hazardous liquid or carbon dioxide is chemically compatible with both the pipeline, including all components, and any other commodity that it may come into contact with while in the pipeline.

[Amdt. 195-45, 56 FR 26925, June 
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- **markdown:** https://regulus.evalyn.ai/document/49-cfr-195-4.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-195-4
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-195.4
**body:**

No person may transport any hazardous liquid or carbon dioxide unless the hazardous liquid or carbon dioxide is chemically compatible with both the pipeline, including all components, and any other commodity that it may come into contact with while in the pipeline.

[Amdt. 195-45, 56 FR 26925, June 12, 1991]
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