GlossaryEN1 min readUpdated: Jun 22, 2026

International Maritime Dangerous Goods Code

At every stage where dangerous goods meet a vessel – booking, packing, documentation, stowage planning – the IMDG Code sets the rules.

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Last updated: 22 June 2026Published: 19 June 2025

Source: https://www.imo.org/en/OurWork/Safety/Pages/DangerousGoods-default.aspx

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Definition & Explanation

At every stage where dangerous goods meet a vessel – booking, packing, documentation, stowage planning – the IMDG Code sets the rules. The International Maritime Dangerous Goods Code, published by the International Maritime Organization (IMO), is the globally binding framework for carrying hazardous materials by sea. It classifies dangerous goods into nine classes, from explosives (Class 1) to miscellaneous hazardous substances (Class 9), and prescribes packaging standards, marking and labelling requirements, documentation obligations, and emergency response procedures. Shippers and freight forwarders are responsible for correct classification and declaration; carriers may refuse misdeclared cargo. Non-compliance can result in substantial fines and, in the event of an incident, significant liability exposure. The Code is updated periodically through amendments that enter into force on fixed effective dates.