Global Harmonization of Hazard Classification and Labeling Systems

International Maritime Organization

The International Maritime Organization (IMO) is responsible for maintaining and updating the International Maritime Dangerous Goods Code (IMDG Code) which governs the vast majority of maritime hazardous materials shipments. The IMDG Code is intended to provide for the safe transportation of...

International Civil Aviation Organization

The International Civil Aviation Organization Technical Instructions for the Safe Transport of Dangerous Goods by Air (ICAO TI) augment the broad principles governing the international transport of hazardous materials by air contained in Annex 18 to the Convention on International Civil Aviation...

49 CFR 172.101 Appendix A

Forbidden Materials

49 CFR 172.101 Hazardous Materials Table 49 CFR 173.21 Forbidden Materials and Packages

Guidance on Applicability of Quantity Limits

U.S. Variations to the ICAO TI

UN Recommendations

/hazmat/international-standards/commercial-suppliers-list

International Program Overview

PHMSA's International Program provides leadership in the development of international hazardous materials transportation safety standards. The program draws on PHMSA's technical expertise, stakeholder participation, and multi-modal collaboration to support...

Hazardous Materials Petitions

The table below lists open petitions for rulemaking that PHMSA has received requesting amendments to the Hazardous Materials Regulations (49 CFR Parts 171-180). The Petition Number (e.g., P-0001), the Docket ID, and the Name of Petitioner are listed, and the...