The 9 Hazmat Classes: A Miami Shipper’s Guide

Hazmat shipping starts with correctly classifying your dangerous goods into one of nine hazard classes, then packaging, labeling, and documenting them to the right rulebook (IATA for air, IMDG for ocean, DOT 49 CFR for ground) and moving them with a certified carrier. Getting the class and UN number right is the foundation of every compliant shipment from Miami.

The nine classes at a glance

Class 1 explosives; Class 2 gases; Class 3 flammable liquids; Class 4 flammable solids; Class 5 oxidizers and organic peroxides; Class 6 toxic and infectious substances; Class 7 radioactive; Class 8 corrosives; Class 9 miscellaneous (including dry ice and lithium batteries). Each has its own packing group, quantity limits, and labels.

Air vs ocean

Air shipments follow the strict IATA Dangerous Goods Regulations; ocean freight uses the IMDG Code. A carrier certified in both can advise the cheaper compliant mode. See our hazmat and certification service.

Documentation and drivers

You need a Dangerous Goods Declaration, correct placarding, and hazmat-endorsed drivers. Pair hazmat with drayage or LTL as needed.

Frequently asked questions

What is the most common hazmat mistake?

Misclassification, using the wrong UN number, shipping name, or packing group, which cascades into wrong packaging and labels and gets shipments held.

Which class covers lithium batteries?

Lithium batteries fall under Class 9 (miscellaneous) and require proper packaging and documentation.

Shipping dangerous goods from Miami? Get a quote or call (786) 445-0150.