IMDG Dangerous Goods Labels

A Complete Guide to Understanding Maritime Hazard Labels

When shipping dangerous goods by sea, correct labeling is just as important as proper packaging and documentation. Under the International Maritime Dangerous Goods (IMDG) Code, every hazardous shipment must display the appropriate danger labels to ensure safe handling, storage, and transportation.

Whether you're a shipper, freight forwarder, or importer/exporter, understanding IMDG labels helps reduce risks, prevent accidents, and comply with international regulations.

What are IMDG Dangerous Goods Labels?

IMDG Dangerous Goods Labels are standardized hazard labels used to identify the type of risk associated with dangerous goods transported by sea.

These labels help:

Protect cargo handlers and vessel crews
Support emergency response during incidents
Ensure compliance with international shipping regulations
Reduce delays caused by incorrect declarations

Each label follows an internationally recognized design and is based on the UN Dangerous Goods Classification System.

The 9 Classes of Dangerous Goods

Additional Marks You May See

Besides hazard labels, shipments may also require additional marks, such as:

Marine Pollutant Mark
Elevated Temperature Mark
Orientation Arrows (for liquids)
Limited Quantity (LQ) Mark
Lithium Battery Mark (where applicable)

These markings provide extra information for safe handling and regulatory compliance.

Why Correct Labeling Matters

Incorrect or missing labels can result in:

Shipment delays
Customs or port rejection
Safety incidents
Regulatory penalties
Increased liability for the shipper

Always verify that the labels match the UN Number, Proper Shipping Name (PSN), and the dangerous goods declaration before shipping.

IMDG Dangerous Goods Labels are more than compliance stickers—they are a universal safety language used worldwide to protect people, cargo, vessels, and the environment.

Proper classification and labeling ensure dangerous goods move safely through the global supply chain while meeting international shipping regulations.