Official US Government Icon

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.

Secure Site Icon

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

The latest general information on the Coronavirus (COVID-19) is available on For PHMSA contact information during the COVID-19 health emergency, please visit our page.

United States Department of Transportation United States Department of Transportation

UN Test Series 6(d)

Special Provision 347 - UN Test Series 6(d) of Part I of the UN Manual of Tests and Criteria, is required for eight UN Numbers- UN0323, UN0366, UN0441, UN0445, UN0455, UN0456, UN0460 and UN0500 for shipments by air (July 1, 2011) or vessel (January 1, 2012). Shipments of the above listed eight UN numbers by rail or highway are permitted without the UN Test Series 6(d) testing until December 31, 2013. SEE HM 215K.

For questions regarding compliance, contact the Hazardous Materials Information Center at 800-467-4922.

Last updated: Friday, April 7, 2017