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 #04-0096 ([Chemical Lime Company] [Mr. Kevin Anderson])

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

Interpretation Response Details

Response Publish Date:

Company Name: Chemical Lime Company

Individual Name: Mr. Kevin Anderson

Location State: TX Country: US

View the Interpretation Document

Response text:

Jul 18, 2005


Mr. Kevin Anderson                 Reference No. 04-0096
Technical Services
Chemical Lime Company
3724 Hulen Street
Ft. Worth, Texas 76107

Dear Mr. Anderson:

This responds to your letter requesting assistance in classifying a chemical mixture for transportation by aircraft under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you ask whether a mixture of calcium- magnesium oxide meets the definition of a corrosive solid under the HMR and, if so, what would be the most appropriate shipping description for the material. I apologize for the delay in responding and any inconvenience it may have caused.

Under § 173.22 of the HMR, it is a shipper’s responsibility to properly classify a hazardous material. This Office does not normally perform that function. Further, we do not have the capability to determine the corrosivity of an unlisted material, such as a mixture, without the results of tests conducted on the material as specified in § 173.136 and 173.137. If you are not able to perform corrosivity testing on your material, we recommend that you contact a laboratory capable of performing such testing. The American Society for Testing and Materials (ASTM) maintains an internet website that offers a directory of laboratories that can satisfy this requirement. The ASTM website can be found at:

I trust this satisfies your inquiry. Please contact us if we can be of further assistance.



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

172.101, 173.22

Regulation Sections

Section Subject
172.101 Purpose and use of hazardous materials table
173.22 Shipper's responsibility