ADR Hazard Classes Explained: The 9 Classes of Dangerous Goods

Complete guide to the 9 ADR hazard classes: explosives, gases, flammable liquids, flammable solids, oxidisers, toxic substances, radioactive materials.

ADR classifies dangerous goods into 9 hazard classes, each with its own transport rules. This guide explains all 9 classes — from explosives and gases to radioactive materials and lithium batteries — and what ADR training you need.

Read the full article on GS Driver Training Blog.

Related Articles

More guides in the ADR Training category:

• How to Get an ADR Licence
• How to get an ADR Card
• ADR Training Guide UK: Everything You Need to Know About Dangerous Goods Driver Training
• The Complete Guide to ADR Training in the UK (2026)
• ADR Licence Cost UK 2026: Full Breakdown

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