Class 3 label: flammable liquids (red diamond, flame)
The package contains a flammable liquid: petrol, paint, varnish, solvents, perfume, nail-varnish remover, alcohol-based hand gel, lighter fluid.
Who puts it on the box
The sender (consignor).
How to read it
Keep it away from flames, sparks and heat. Retail sizes usually travel as limited quantities, with the black-and-white diamond instead of this label; the red label means a larger or fully regulated consignment.
What it does not promise
It does not promise how easily the liquid ignites — the packing group on the documents says that — and it does not promise the parcel may go by post or air.
A mark on a parcel is the sender’s statement about what is inside and how it should be handled. It is not a certificate that the parcel is packed safely, that anyone handled it as marked, or that your carrier accepts it: for what you may send, read the carrier’s own terms.
- What it looks like
- A red diamond with a black (or white) flame at the top and the figure 3 in the bottom corner.
- Regulation
- ADR 2025, 5.2.2.2.2, label model No. 3; UN Model Regulations 5.2.2.2.2
- Kind of mark
- A dangerous-goods mark or label from the UN Model Regulations, applied in Europe by ADR (road) and its sister agreements for rail and waterways, and on the same pattern by the US 49 CFR. It says the package holds dangerous goods.
- Also called
- Flammable liquid label; Red flame diamond
Related
Other marks with the same shape
Sources
Each document was fetched and read on the date shown. Written in our own words; quotations are the documents’ wording.
- Regulator guidance — Health and Safety Executive (UK regulator for the carriage of dangerous goods): Carriage of dangerous goods manual — Consignment procedures: marking and labelling of packages (ADR 5.2) — Package labels are the “hazard diamonds” of ADR 5.2.2 with the class number; specimen labels are in ADR 5.2.2.2.2 and sizes in 5.2.2.2.1.1; the consignor is responsible for marking and labelling. Checked 2026-09-27.
- Law adopting the same mark — US Government Publishing Office (govinfo), 49 CFR, edition of 1 October 2024: 49 CFR Part 172 Subpart E — Labeling (§§ 172.400–172.450, the hazard class labels) — § 172.419: the FLAMMABLE LIQUID label, flame on red. Labels are at least 100 mm on each side with an inner border about 5 mm inside the edge (§ 172.407). Checked 2026-09-27.