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 #00-0240 ([University of Hawaii at Manoa] [Ms. Julie Coughlin])

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

Interpretation Response Details

Response Publish Date:

Company Name: University of Hawaii at Manoa

Individual Name: Ms. Julie Coughlin

Location State: HI Country: US

View the Interpretation Document

Response text:

October 13, 2000


Ms. Julie Coughlin                           Ref. No. 00-0240
University of Hawaii at Manoa
St. John 307
3190 Maile Way
Honolulu, HI 96822

Dear Ms. Coughlin:

This is in response to your August 25, 2000 letter requesting clarification of shipments of diagnostic samples frozen with dry ice under the Hazardous Materials Regulations (HMR; 49 CFR Parts 17 1 ­180).

For shipments by aircraft, Carbon dioxide, solid or Dry ice, UN 1845, is excepted from the HMR when used as a refrigerant for the contents of a package if in quantities less than 2.3 kg of dry ice per package, provided it is packed according to § 173.217. This section requires the packaging to be vented and to meet the general packaging requirements of Part 173 Subpart B. In addition, the package must be marked with the name of the contents being cooled, the net weight of the dry ice or an indication that the net weight is 2.3 kg or less, and the text “Carbon Dioxide, Solid” or “Dry Ice” (§ 175.10(a)(13)(i)).

For example, an air shipment of fruit samples refrigerated by 2 kg of dry ice is not subject to any other requirement of the HMR if the packaging is designed and constructed to permit the release of carbon dioxide gas, meets the general packaging requirements of Part 173, and you mark the package with the words, “fruit”, “2 kg” and “Dry Ice.”

I hope this information is helpful.  If you have further questions, please do not hesitate to contact this Office.



Delmer F. Billings
Chief, Standards Development
Office of  Hazardous Materials Standards



Regulation Sections

Section Subject
173.217 Carbon dioxide, solid (dry ice)