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    Table of contents

      Overview of UN Numbers

      UN numbers (United Nations numbers) are four-digit codes used to identify hazardous materials or classes of hazardous materials in international transport. These numbers are assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods and are published in their Recommendations on the Transport of Dangerous Goods, commonly known as the Orange Book.

      The purpose of UN numbers is to provide a globally recognized system for identifying dangerous goods, which facilitates safe handling, storage, and transportation.

      Logos for the different types of ADR classifications

      List of UN Numbers and Descriptions

      Below is the extensive and complete list of UN Numbers.

      Remember that UN numbers should be used in conjunction with other information, such as proper shipping names, hazard classes, packing groups, and special provisions, to ensure the safe handling and transport of dangerous goods. This information is typically found in safety data sheets (SDS) and on shipping labels.


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