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 #11-0019 ([Kajuligan Corporation] [Mr. Clifford Croft])

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

Interpretation Response Details

Response Publish Date:

Company Name: Kajuligan Corporation

Individual Name: Mr. Clifford Croft

Location State: IL Country: US

View the Interpretation Document

Response text:

March 17, 2011




Mr. Clifford Croft

Director of Regulatory Compliance

Kajuligan Corp.

1533 Kirkwood Drive, Geneva, IL 60134

Ref. No. 11-0019

Dear Mr. Croft:

This responds to your letter requesting the proper classification of 10% buffered formalin under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). In your letter, you state your 10% Formalin solution contains 3.5-4% formaldehyde solution. You also state that based on the International Civil Aviation Organization entry, a formaldehyde solution that is less than 10% solution is not regulated as aviation regulated liquid, n.o.s. UN 3334. You ask whether a 10% buffered formalin with 3.5-9.9% formaldehyde solution is not regulated by any mode of transportation.

As provided by § 173.22 of the HMR, it is the shipper's responsibility to properly class a hazardous material. This Office generally does not perform this function. Manufacturers, generally have the knowledge to properly class the materials and products they produce, although it may be necessary to enlist an outside laboratory to assist in the classification process as testing may have to be conducted to determine how a product compares to the criteria for the various hazard classes. However, although you did not provide sufficient information, such as a Material Safety Data Sheet, the acute effects of Formaldehyde Solutions have been well documented. A 10% Formalin (3-5% formaldehyde solution), typically used to preserve biological samples, meets the definition for a Class 9 material in § 173.140 and is subject to regulation when transported domestically by air. The appropriate shipping description is "Other Regulated Substances, liquid, n.o.s. (formaldehyde), 9, NA3082, III." Generally, solutions of less than a 10% formalin mixed with non-hazardous materials are not subject to the HMR, provided they do not meet the definition of a class 9 hazardous material or any other hazard class.

I hope this satisfies your request.


T. Glenn Foster

Chief, Regulatory Review and Reinvention Branch

Standards and Rulemaking Division

173.22 173.140

Regulation Sections

Section Subject
173.22 Shipper's responsibility