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 #10-0112 ([Micro Scientific Industries, Inc.] [Mr. Jack Wagner])

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

Interpretation Response Details

Response Publish Date:

Company Name: Micro Scientific Industries, Inc.

Individual Name: Mr. Jack Wagner

Location State: IL Country: US

View the Interpretation Document

Response text:

June 17, 2010




Mr. Jack Wagner

Director, Scientific and Regulatory Affairs

Micro Scientific Industries, Inc.

1225 Carnegie Street, Suite 101

Rolling Meadows, IL 60008

Ref. No. 10-0112

Dear Mr. Wagner,

This responds to your letter dated May 7, 2010 requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) as they apply to an aqueous solution of alcohol that your company ships. The material that you ship contains 20% isopropyl alcohol, more than 75% water, and less than 5% of various non-hazardous surfactants. Specifically, you ask if the product described meets the exception for aqueous solutions of alcohol under the HMR.

The answer is yes. Aqueous solutions of alcohol, that contain no other hazardous materials, are excepted from the requirements of the HMR when they contain 24% or less alcohol by volume and no less than 50% water.

I hope this information is helpful. If you have further questions, please contact this Office.


Charles E. Betts

Chief, Standards Development

Office of Hazardous Materials Standards

171.1, 173.150(e)

Regulation Sections

Section Subject
171.1 Applicability of Hazardous Materials Regulations (HMR) to persons and functions
173.150 Exceptions for Class 3 (flammable and combustible liquids)