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

Interpretation Response #05-0080 ([Ms. Amy Dean])

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

Interpretation Response Details

Response Publish Date:

Company Name:

Individual Name: Ms. Amy Dean

Location State: CO Country: US

View the Interpretation Document

Response text:

May 5, 2005


Ms. Amy Dean                      Reference No. 05-0080
1161 Alter Way
Broomfield, CO 80020

Dear Ms. Dean:

This is in response to your April 4, 2005 letter regarding the appropriate shipping description for various fertilizer blends under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you ask about the appropriate shipping descriptions for two fertilizer blends. The first blend consists of 81% ammonium nitrate, 0-2% talc or conditioning agent, and 19% mono ammonium phosphate. The second fertilizer blend consists of 66% ammonium nitrate, 19% mono ammonium phosphate, and 15% potash.

Section 173.22 specifies that it is the shipper’s responsibility to properly class and describe a material in accordance with the HMR. This office does not perform that function. However, based on the information provided, it is our opinion that the first fertilizer blend specified should be described as “Ammonium nitrate based fertilizer, 5.1, UN2067” and the second fertilizer blend should be described as “Ammonium nitrate based fertilizer, 9, UN2071.”

I hope this information is helpful.



Hattie L. Mitchell, Chief
Regulation Review and Reinvention
Office of Hazardous Materials Standards


Regulation Sections

Section Subject
172.101 Purpose and use of hazardous materials table