Hazmat Label Helper

Anyone transporting dangerous goods by road cannot avoid the ADR - the European agreement on the international carriage of dangerous goods. Every substance has a UN number, belongs to a hazard class and needs the matching hazard placard, the familiar diamond-shaped label. Incorrectly labelled dangerous goods are not just a fine risk but a real danger to everyone who, in an emergency, needs to know what they are dealing with.

The Hazmat Label Helper takes the looking-up off your hands. The tool includes a database of common UN numbers - from UN1202 diesel through UN1203 petrol and UN1830 sulphuric acid to UN3481 lithium-ion batteries. You search by UN number or substance name and instantly get the hazard class, the ADR division, the packing group, the tunnel restriction and a note on whether transport documents are mandatory.

The key detail is the colour. Many believe the placard colour depends on the class number - but that is only roughly true. In reality the colour follows the division: flammable gas 2.1 is red, non-flammable gas 2.2 green, toxic gas 2.3 white, and class 4.3 substances that react dangerously with water carry a blue label. The tool knows this distinction and picks the correct colour automatically, instead of letting you walk into a classic trap.

From the data, the tool generates a label with the diamond hazard placard, the class digit and the UN number, which you can download and print directly. That gives you fast, clean labelling for packages without leafing through the ADR tables every time or grabbing a label from the drawer on a hunch.

Very important context: this tool is a work aid and reference helper, not a substitute for the binding ADR and not dangerous-goods legal advice. The colours shown are approximations of the official patterns, and striped or two-tone labels are shown simplified. For the legally compliant labelling, the exemption limits and the obligations of your specific transport, your dangerous-goods safety adviser or the current ADR is authoritative if in doubt.

Everything runs in your browser, with no account and no data transfer. For warehouse staff, shipping departments, small hauliers and trades that occasionally ship hazardous substances, the helper is a quick route to the right UN number and the matching label - a solid first orientation before things get serious.