# Hazardous Materials Regulations: Transportation of Compressed Oxygen, Other Oxidizing Gases and Chemical Oxygen Generators on Aircraft
> **Pipeline and Hazardous Materials Safety Administration** · Final rule. · Published 2007-01-31 · Effective 2007-10-01 · 72 FR 4442
## Document
- **Document number:** E7-1487
- **Category:** pipeline-safety
- **Sub-agency:** Pipeline and Hazardous Materials Safety Administration
- **Federal Register citation:** 72 FR 4442
- **CFR reference:** 49 CFR 171
- **Publication date:** 2007-01-31
- **Effective date:** 2007-10-01
- **DOT docket:** Docket No. RSPA-04-17664 (HM-224B)
## Abstract

PHMSA (also, "we" or "us") is amending the Hazardous Materials Regulations (HMR) to: require cylinders of compressed oxygen and other oxidizing gases and packages of chemical oxygen generators to be placed in an outer packaging that meets certain flame penetration and thermal resistance requirements when transported aboard an aircraft; revise the pressure relief device (PRD) setting limit on cylinders of compressed oxygen and other oxidizing gases transported aboard aircraft; limit the types of cylinders authorized for transporting compressed oxygen aboard aircraft; and convert most of the provisions of an oxygen generator approval into requirements in the HMR. PHMSA is issuing this final rule in cooperation with the Federal Aviation Administration (FAA) to increase the level of safety associated with transportation of these materials aboard aircraft.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2007/01/31/E7-1487/hazardous-materials-regulations-transportation-of-compressed-oxygen-other-oxidizing-gases-and)
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