USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Interpretation Response #07-0053 ([Allied Universal Corporation] [Mr. Robin J. Eddy Bolte])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: Allied Universal Corporation

Individual Name: Mr. Robin J. Eddy Bolte

Location State: FL Country: US

View the Interpretation Document

Response text:

Apr 4, 2007


Mr. Robin J. Eddy Bolte                 Reference No. 07-0053
Regulatory Affairs Manager
Allied Universal Corporation
3901 NW 115 Avenue
Miami, FL 33178

Dear Mr. Bolte:

This responds to your letter dated March 1, 2007, regarding whether a material described
as “Sulfur dioxide, 2.3, UN 1079” is regulated under the Hazardous Materials Regulations (HMR 49 CFR Parts 171-180) as a hazardous substance requiring entry of the letters on shipping papers and package markings.

The answer is no. Under the HMR, “Sulfur dioxide” is not specifically listed as a hazardous substance in § 172.101, Appendix A and, therefore, does not meet the definition of a hazardous substance in § 171.8. The letters “RQ” may not be shown on the shipping paper or package marking in association with the proper shipping name.

I hope this satisfies your inquiry. If we can be of further assistance, please contact us.



John A. Gale
Chief, Standards Development
Office of Hazardous Materials Standards

172.101, 171.8

Regulation Sections

Section Subject
171.8 Definitions and abbreviations
172.101 Purpose and use of hazardous materials table