Mass Markings on International Packages

This is in response to your January 18, 2006 telephone conversation with a member of my staff and subsequent letter requesting clarification regarding the marking requirements for hazardous materials as specified under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). In your scenario, you ship non-bulk packages of corrosive and flammable materials overseas by both air and vessel. Specifically, you ask if there are any foreign or domestic requirements that require you to mark the outside of these packagings with an indication of the mass.

This Office handles questions regarding the transportation of hazardous materials in commerce as specified in the HMR. Under the HMR, there are no provisions that require an indication of the mass on the outside of a non-bulk packaging containing either a flammable or corrosive material.