Dangerous Goods Shipments: What Every Freight Forwarder Must Get Right

Dangerous goods shipments — chemicals, batteries, flammable liquids, gases, and dozens of other commodity categories — are among the most tightly regulated freight types in the world. They are also among the most commonly mishandled by freight forwarders who are comfortable with general cargo but less familiar with DG-specific requirements.

The documentation a DG shipment requires

• Dangerous Goods Declaration (DGD): the core document for ocean DG shipments, declaring the UN number, proper shipping name, class, packing group, quantity, and emergency contact information. Must be signed by the shipper.
• Material Safety Data Sheet (MSDS): the detailed technical safety profile of the substance.
• Container Packing Certificate: certifies that the container has been packed in accordance with IMDG requirements.
• Emergency Response Information: must be available to the carrier in a form they can act on if an incident occurs.
• ## The mistakes that lead to cargo rejection and carrier bans

The most common DG handling mistakes by freight forwarders are: submitting incorrect UN numbers (particularly for lithium batteries, where specific rules depend on whether they are packed with or in equipment), using outdated IMDG editions, using non-IMDG-compliant packaging, and failing to declare mixed shipments where the DG is part of a larger general cargo booking.

Carriers who receive a DG shipment with incorrect documentation reject it at the port — after you have spent money on origin-side logistics. Some carriers ban shippers or agents from future DG bookings after repeated declaration errors.

Key Takeaways

1. IMDG (ocean) and IATA DGR (air) are different regulations — a good that can be shipped by ocean may not be permitted on air at all.

2. The four essential DG documents: Dangerous Goods Declaration, MSDS, Container Packing Certificate, and emergency response information.

3. A forwarder who presents a DG declaration endorses its accuracy and bears liability for errors. In-house DG certification is a commercial investment, not just a compliance one.

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