[Header] PHMSA - U.S. Department of Transportation - Pipeline and Hazardous materials Safety Adminis
Oxygen Generators

A chemical oxygen generator is a device containing chemicals that upon activation release oxygen as a product of a chemical reaction. Chemical oxygen generators are found in a number different devices, such as passenger service units (PSU) for aircraft and portable breathing equipment.

The requirements for chemical oxygen generators were revised in a final rule issued under HM-224B. As provided in ยง 173.168 a competent authority is no longer required for chemical oxygen generators when shipped in accordance with the provisions contained in this section. 

Send email to approvals@dot.gov or call 202-366-4535.

Approvals Search Tools

The approvals search tool is a powerful and effective method to determine the current status of a submission, existing approval, pending approval, terminated approval or expired approval.

If you need information concerning application status that is not available in this search, please contact: approvals@dot.gov or call 202/366-3987.

How Do I Get an Approval?